Opera 5 Windows User FAQ ------------------------ By Opera users, for Opera users. Last updated December 13, 2000 Compiled from frequently asked questions in Opera net news groups and mailing list messages: news://news.opera.no http://web.opera.com/mailman/listinfo/opera-users Posted To Opera news groups: opera.general, opera.test Update Frequency: as needed. Post Frequency: Monthly, or as needed. Latest Editing Web: http://www.webmasterworld.com/opera/ Current Keeper: Brett Tabke (opera5faq@operamail.com) Contributions welcomed and encouraged, feel free to send corrections and updates to: opera5faq@operamail.com Also available is Samuli Lintula's Opera 5 FAQ in Finnish: http://users.utu.fi/saklint/sekalaista/operahelp.html Translations into other languages encouraged. Distribution Request: if you post it on a web site, please keep it updated as updates are posted in as near to original form as possible. Intro: This FAQ is oriented toward issues that have been expressed in user messages since the release of Opera 5. If you are new to Opera, you may find it more useful to read Opera Software's own quick start guide at: http://www.opera.com/support/Intro.html The help files within Opera also have a wealth of information (F1). For newer users, there is a Glossary and Legend at the bottom of this document. If you respond in news groups to this message, please be kind to other readers by not quoting the entire message. Contents -------- [ Upgrade & Installation Issues ] [ General Opera 5 Issues ] [ User Interface ] [ Proxies ] [ Page Display Issues ] [ Search Engine Search Feature ] [ Opera Software Free Version Issues ] [ Email & News ] [ Caching ] [ Buttons & Toolbars] [ Messenger ] [ Hotlist & Bookmarks ] [ Cookies ] [ Mice, Pointers, & Clicks ] [ Cascading Style Sheets ] [ FAQ Legend & Brief Glossary ] ----------------------------------------------------------------- [ Upgrade & Installation Issues ] Q: I've used 3.62 and skipped 4, is it safe to upgrade? A: For the most part, yes it is. If unsure, keep your current installation and install in a new directory (details below). Q: Is there a list of known issues discovered with Opera 5. A: Sue Sims of Opera Software has put a list together: http://www.opera.com/support/known-issues-5.html Q: Can I keep both Opera 3.62 and Opera 5 on the same machine? A: Yes. You'll only be able to run one copy at a time, but they will coexist on the hard drive nicely. You can also use the same bookmarks. Although there are no known conflicts between the 3.62 opera.ini file and the v4 or v5 ini files, it is probably best to keep separate ini's between 3.62, v4, and v5 (there have been many new configurable options added). Q: How do I install a second copy as an upgrade but keep my current Opera 4 or Opera 3.62 installation? A: Duplicate your current Opera 4 installation and then install Opera 5 on top of the new duplicated installation. Details: - Move your \Windows\opera.ini file into the V4 directory if it is not there. - Copy your v4 directory and all files to a new directory where you want to install Opera 5. - Edit the opera.ini in the new Opera 5 directory replacing all occurrences of the old path to opera 4 with the new path to opera 5. Click on the Opera5 program you downloaded. - When asked where to install the program, browse to the new Opera 5 directory you just created. - Opera 5 will be installed on top of Opera 4 in the new directory. - Your old Opera 4 will still be in the old directory. - After installing over Opera 4, you'll probably want to update your toolbar button preferences. (see [buttons]) If want to upgrade 3.x via the above, delete your current cache from Opera before copying (a new cache directory will be made). The above seems to have no unwanted side effects. Q: How do I set Opera as the default browser for HTML files? A: Go to Opera's preferences (ALT-P) and select Default Browser. Check the boxes next to "htm, html, http, and https". (note: under file types, we can almost assure you that you do NOT want to check any file types other than htm and html unless you are fully aware of the consequences. If you do so, you could break your functionality of other programs that rely on those file types to operate). [Opera 5 User Interface] Q: If I open a new window with all other windows minimized one of the minimized ones will open back up. Is there a fix? A: Known problem. You might try enabling the Window Bar. Some have reported limited success, but it still can occur. Q: Is there a way that pop-up windows won't resize & cascade other maximized windows even when I have "maximize if appropriate" set? A: Also known as a difference between Opera 4 and Opera 5. One known work around is to use a window controller such as OpWic by Josef Segur http://www.westelcom.com/users/jsegur/ Q: Is there any way to get URI's to show in Opera global history list? A: The layout of the history window is set by the history.css style sheet. Just add some line like this: td.address a:after {content: " (" attr(href) ") "} (Jonny Axelsson Documentation, Opera Software) Q: Can I see the URLs in the window history instead of page titles? A: No. Q: How do I turn off the Opera splash screen when it starts? A: Edit your opera.ini and add the following: show splash screen=0 Q: Can I have two different configurations for two different users? A: Yes. Opera configuration is controlled by it's opera.ini file. You may specify which configuration to use by including the ini filename in the command line (shortcut) parameters. You can copy your current opera.ini to a new files such as "bobs.ini". Hold down CONTROL while clicking and dragging on your Opera start icon. Release and this will make a duplicate on the desktop (or win98 start menu). Right click on the new icon and select "properties". In the "target" window just add "bobs.ini" to the end of the opera target command line. Click OK. Highlight the new icon with a single click, press F2 and rename the icon for Bob. When you start Opera from Bob's icon, it will use the "bobs.ini" file to save it's configuration settings and preferences. You may also use Phil Burns Opera profile maker found at: http://www.esatclear.ie/~phiznlil/software.html [General Opera 5 Issues] Q: How do I report a bug? A: Visit the Opera.com website and fill out a bug report. Currently at: http://bugs.opera.no/bugreport.cgi Q: Should I report a bug in the Opera news groups? A: In the past, the opera.beta newsgroup has been used for this purpose. Please read the opera.beta group before posting. By now, most of the moderate to severe bugs have been exposed and reported in the Opera News groups. Please check Sue Sims list of known v5 issues at: http://www.opera.com/support/known-issues-5.html If you question whether it is a bug or a configuration problem, by-all-means ask away in the opera.general group. (Is that the proper procedure to follow OS?) Q: Why don't I get a new window when I click on a link that has target=_blank? A: It is a known bug with version 5 build 828. Q: Can I configure the validation url? A: Yes, via the ini. Add the following to your ini and set the URL= to where you want the file uploaded. This can be good for those with certain types of web interfaces to their websites. [User Prefs] Validation URL=http://validator.w3.org/check Validation Form Element=uploaded_file (-Peter Karlsson, Developer opera software) Q: I set my homepage, why does Opera start with some other site? A: Go to preferences, "start and exit" then select 'show single window with global home page' to use the global home page on startup (-tranquilo). Q: How do I view a directory in Opera? A: Just type c: (or whatever drive letter) into Opera's address window. You may also browse all drives with "opera:drives". Like other Opera displays, the directory and drives displays also have their own CSS files in the Styles directory. Filenames are dir.css, and drives.css respectively. Q: Is there a way I can set the new MDI window size? A: Yes, by editing the [User Prefs] opera.ini and adding: NewWinSize = 640,480 The two numbers are height and width in pixels. The default is -1,-1 which sets to the windows default itself. If you set the size to large, you may be in danger of creating windows that are "under" the bottom border. Using the preferences option under "windows:show window size" can be helpful to determine your favorite settings. Q: How do I open a link underneath with the keyboard? A: CTRL+SHIFT+ENTER or CTRL+SHIFT+SPACE is supposed to do that. It doesn't (eg: bug). Q: How can I delete the Opera URL history list? A: Go to Prefs (alt-p) "History and Cache" and set global history to 0. Press apply, set back to the desired number, press ok. Or, go to your opera directory and delete the file "global.dat". (-tranquilo) Q: Random links seem to drop out of the "visited" register? A: Are these password protected pages? In which case it isn't a bug, but a (security) feature so that no one can use the history file as a back door. Those pages are selectively removed from the history file. (Jonny Axelsson, Documentation, Opera Software) Q: When I try to enter a Yahoo club chat room, why do I get a message about a failed certificate check? A: To correct, set Opera to identify itself as Opera in Preferences - Connections - Browser Identification. (-William D. Weeks) Q: What are the command line parameters for Opera 5? A: http://www.opera.com/opera5/sysadmin.html [Connections] Q: Why can't I view any pages? Opera just sets there "waiting for connection" or "looking up host name". A: It may be a DNS issue. Go to Preferences (ALT-p) and check "Synchronous DNS". Most often occurs with Windows 95. Q: How do I resume a file download? A: If a download stops, just right click it and choose resume transfer. If you need to stop, right click it and choose cancel transfer. (-Timothy L. Miller) Q: Why can't view Shockwave's page after I installed the shockwave plugin? A: Try the setting your Browser Identification (Prefs-connections) to "Mozilla 4.76". (-Nils Arenz) Q: Can I save multiple window states for different groups of pages? A: Just save them under different names, set opera not to use them at startup, and open your saved windows as desired. (-tranquilo) Opera stores window states in files ending in ".win". You may load a .win file from the File-Open command (CTRL-O). It is one of the more esoteric Opera features; but many people use these types of stores windows as a small bookmark style setup for their favorite page sets. You might try creating a "SavedWindows" directory under your main Opera directory just to save Window .win files. Then bookmark the directories location. You can save the current window set from the main menu bar "Window - Save All" command. [Proxies] Q: Why can't I use authenticate proxy servers? A: A known bug in v5 build 828. Someone suggested trying to daisy chain Opera to another proxy server that can connect to the true proxy server that requires authentication. [Page Display Issues] Q: A website doesn't display correctly. What should I do? A: View the page in Opera. Right click on the page. Select "frame" and then "validate html". You may be prompted if it is ok to submit a file, depending on your security "show alert before submitting forms insecurely" setting. Just select ok. The file will be uploaded to the W3C HTML validation tool at (http://validator.w3.org/check). When the validation report is complete and it contains errors - send that to the webmaster of the site. You can "Save" the page via the File Menu Save (ALT-s) option or by pressing ALT-F3 to load it in your source code viewer. Import it into your email program and send with a request to fix their page (please be nice to these people - most will care about these issues). If the report contains no error, submit a bug report to Opera Software including the URL (address) where the problem occurred. Q: I have links set to underline. Why don't they show up that way? A: It is a complex combination of user settings and page settings. An imperfect solution that works 95% of the time is to run your own user CSS file. The most effective way, is to uncheck "Document CSS" in the Document preferences and set your own Link presentation via that same preferences dialog. You may also run a proxy filter to remove link commands from CSS files and html documents. One that works is Proxomitron. http://proxomitron.cjb.net/ Q: Opera has a presentation mode? A: Demo and tutorial at: http://www.opera.com/opera5/operashow.html A demo at Sue Sims site: http://sue-sims.nu/opera/resources/media-demo.html Q: A web page said I used an unauthorized link? A: The site is looking for a http "referrer" header. Enable "Referrer logging" in Preferences (ALT-p) Privacy. Q: A web page said I need to use another browser? A: The site is expecting a browser identification Agent string for some other browser. Go to Preferences (alt-p) Connections, and switch your "Browser Identification" to the requested agent. Please switch it back to Opera when finished with the site. If this does not work, email the site and request that they update their site to work with Opera. [Search Engine Searching] Q: Can I configure the search engines used in the search function? A: No. Please support the Opera user base by requesting they include this as an option in future releases. Q: I'm just wondering what this "source ID" is in the string sent to search engines? A: Search engines can change their search string values. They also have strict usage agreements that prohibit automated or programmed queries. So a redirect service is used. In this case, Bfast.com. Bfast is a division of Befree.com - a major website affiliate program operator. Bfast maintains the urls, search strings, and has agreements for usage with all of the search engines listed. How do Bfast and the search engines know that Opera is an authorized agent? Via a coded string "source ID" sent from Bfast to the search engine. In this case, SourceID is for "opera", and the "BFMID" identifies which search engine the request is to be sent to. Commission Junction is used in the same manner for the "Company" search. The "domain name" search goes to domaindirect.com. The Goto.com search goes directly to Goto.com, and is also coded with a BeFree affiliate id link. [Opera Software Free Version Issues] Q: What about the advertising display system. Is it a privacy or security concern? A: Opera Software has fully disclosed the banner ad protocol and system used in Opera 5. Opera's documentation: http://www.opera.com/privacy/ http://www.opera.com/privacy/adinfo.html http://www.opera.com/opera5/ads.html Opera Ad Connection Protocol Detail: http://www.myopera.com/people/howcome/2000/opera5/acp.html Opera Software has stated that Opera 5 contains no advertisng code by any one but Opera Software. Additionally; checks by Opera users running various TCP/IP packet viewers (sniffers) has revealed that the system works exactly as Opera has stated in the above documents. (rave) Many people use Opera because of it's perfect track record of security and privacy. In its history, Opera browser has never suffered from a privacy or security bug or breach - not a single one. We are confident that Opera Software would not compromise that record. If anyone is going to get AdWare done right, Opera Software would be the company to do so - by all accounts and information available to us, they have done just that. (/rave) For results from Frode Gill's packet sniffing reports, see opera.general newsgroup on the 6th of December. The following is from opera.general on Dec 9, 2000: "The only way Opera will implement ads is the right way. We have no hidden agenda's and no other motive but to continue to grow our userbase in a responsible way..." (Dean G. Kakridas, Manager of Strategic Alliances Opera Software) Q: Do the ads adversely effect the speed all the time? A: No. Ads are fetched from the server only once a week and stored in the cache to be used throughout the week. This solution ensures Opera's speed is maintained. (from: OS website) Q: How do I remove the advertisements? A: Register Opera. [Email-News] Q: Where do I change the email-news compose font, line length, and word wrap column? A: On the "outgoing" tab of the email account properties. Q: How do I change the font used in news articles? A: Go to ALT-P (prefs) >documents >user fonts and colors >news article body, double click to set the font. Q: How do I change the font and style of incoming email? A: It requires editing the CSS file used by email. It is found in the \Opera5\Styles directory under "email.css". Upgraders may also find an old copy in their \Opera5\Mail directory (delete it or copy it to the Styles directory). Q: Is there a way to create a shortcut from the desktop to a web site that will open in Opera? A: Copy the link url by right clicking on it and selecting "copy link address" or "copy document address". Right-click the Windows desktop to bring up the context menu. Select "New Shortcut". Paste the URL (CTRL-v) into the "Command Line" input box. (Note: make sure Opera is set as the Default Browser on your system for this to work) Q: How do I use Operamail with the email client in Opera? A: Set your mail servers at operamail.com (inbound and outbound). Q: What are the proper ports for incoming and outgoing email? A: Incoming POP3 is port 110. Outgoing SMTP is port 25. Q: Does Opera support SMTP Authentication? A: No, Opera does not support SMTP authentication at this time. Q: Is it possible to use an external newsreader, so that the newsreader will be open when I click a nntp - news:// link in the browser? A: Not at this time. [Caching] Q: Why do some pages refuse to cache in Opera 5 like they did in Opera 3.62?" A: Opera 5 is aggressive at obeying Cache Control, and http EXPIRES headers. More and more sites are becoming hyper retentive about browser caching. Somes larger sites that are dynamically generated (creating web pages out of databases and intended to be updated frequently) use various control headers to thwart browser caching. Solutions: a) A personal proxy server that removes all http headers "expires" and any inbound header with the word "cache" in it. Those in-the-know should get specific about the headers you filter (which is beyond the scope of this FAQ)." b) Editing the opera binary and changing the word "expires" and the proper "cache" control headers. Q: How do you move the cache to a different drive in Opera 5? A: Add or edit your cache directory setting in the opera.ini under the [User Prefs] section: CACHE DIRECTORY4=C:\Program Files\Opera\Cache4 Set the path where the new cache directory is located. [Messenger] Q: How can I tell when someone is online? A: You must first do Messaging|Find User to add users. Then, if they authorize you, you can tell they are online if you can send them a message. If no users are online, you will not be able to choose Messaging then Connected Users. Or, you can just have your Hotlist open to your Contacts at all times and their icon will become a yellow lightning bolt when they are online." (Timothy L. Miller) Q: Word wrap in the messenger isn't working right and I am missing messages off to the right of the screen!? A: In your \Opera5\Styles directory (where Opera5 is your path to Opera), there is a file called im.css. Open that file in a text editor (Maybe Notepad) and change: white-space: pre; to the following: /* white-space: pre; */ You may also download a new style sheet from Opera at: http://www.opera.com/stylesheets/support/im.css [Hotlist - Bookmarks] Q: How do I undock and redock the Hotlist? A: From the menus, choose 'View/Hotlist/Docked' or 'View/Hotlist/Floating'. (Rijk van Geijtenbeek) You may also right click on the space between the word Contacts and the X that closes the Hotlist. The context menu has "docked" or "floating" on it. If in floating mode, use the window menu (top left of the MDI window) to select "docked". Q: Is there any way to import my bookmarks (favorites) from IE5? A: Open the Hotlist (F4 or toolbar button). Right click on a folder and select FILE then select "Insert Internet Explorer Favorites". You can also use a bookmark manager, such as Columbine Bookmark Merge, which is available at http://www.clark.net/pub/garyc." Q: How do I import or insert Netscape bookmarks? A: Open the Hotlist (F2) click on the "Bookmarks" tab, and then right click on any folder. A popup menu will open. Select "File" then "insert file". Browse to your Netscape bookmarks file and it will be inserted in the folder tree. (Thomas Chah) Q: Why are my bookmark links opening a new window? A: Go to preferences (ALT-p), then Windows and uncheck, "Open New windows Automatically". Q: Where are bookmarks stored? A: Bookmark files are stored in files ending in ".adr". The default Opera bookmark file is stored in "Opera.adr". Q: How do I switch to a new bookmark file? A: Open your bookmarks (F4). Right click on any folder. Then select "file" and then "File" and "open". Browse to the bookmark file you wish to open. Q: How do I combine bookmark files? A: Open your bookmark (F4). Right click on any folder or the root folder. Select "file" then "insert file" and browse to the bookmark file. They will be inserted inside the folder that is active. It is probably best to make a new folder and insert the bookmarks there. For example, if you are inserting opera5.adr bookmarks into the opera3.adr bookmarks, make a new folder in the opera3.adr bookmark list and insert the opera5.adr list there. (tranquilo) Q: How do I remove the bottom pane of the Hotlist and just use the top or the bottom? A: Not fully possible. You can move the slider near the top, and then use the Hotlist keyboard short cuts to navigate the folders. Q: How can I determine which bookmark file Opera is using? A: Go to the Help menu and select About. You will also find the following listed there: Preferences Saved windows Bookmarks Opera directory Cache Help documents Plugin path Version information Java Registration information [Buttons & Toolbars] Q: I have downloaded Opera v5, installed it & have no icons whatsoever on any menu bar. Where did they go? A: Goto Prefs (alt-p) - then Toolbars. Under "Button Images" click the browse button. Browse to your Opera5\buttons\ directory and select a "buttons.ini" file in either the "Default" or "Defsmall" directories. Q. I'm experimenting with changing the button bar. Do I have to close Opera and re-start it every time I make a change to "buttons.ini"? A. No. Just go to Prefs (Alt-p), Toolbars, and select any other button set and click "Apply"; then select your file again and click Apply again. You can keep the dialog open and do this until you like what you see. (Coises) Q: Where did my save icon go? A: Room had to be made at the right of the toolbar for the banner displays in the Free version. Several Icons including Save had to be turned off in the default. Your old Opera 4 "buttons.ini" file codes are still valid. Simply replace the entire "[Main Button Bar]" section in the new "buttons.ini" with the one from your old file. Example: [Main Button Bar] Version = 1 # Version, this must be <> 0 Button 0 = 1;1;10000;3 # New Button 1 = 1;0;10001;0 # Open Button 2 = 1;0;10002;3 # Save Button 3 = 1;1;10004;0 # Print Button 4 = 1;0;10009;0 # Copy Button 5 = 1;0;10227;3 # Find Button 6 = 1;1;13010;0 # Toggle hotlist Button 7 = 1;0;13011;3 # Fullscreen Button 8 = 1;1;10032;0 # Back Button 9 = 1;1;10056;0 # Reload Button 10 = 1;1;10031;3 # Forward Button 11 = 1;1;10072;0 # Home Button 12 = 1;0;10059;0 # Goto Button 13 = 1;0;10052;3 # Active bookmark folder Button 14 = 1;0;10019;0 # Tile Button 15 = 1;0;10018;0 # Cascade A few names have changed, and the Previous and Next buttons (now Back and Forward) have drop-down lists; but otherwise, they're the same buttons. (Coises) Q: Where is the "direct url access" button that was in Opera 4? A: Add the following to the [Main Button Bar] section of your buttons.ini: Button xx = 1;1;10059;12 # Open diradr Where xx is the number to put it where you want in the sequence. (Josef W. Segur) Q: I want to move the "Back" Button to the location where the "New" Button is. How can I do this? A: A touch involved for the novice, but doable if you are comfortable editing a text file: Open your buttons.ini in a text editor (notepad). About half way down the file, you'll find a section: [Main Button Bar] It will have a dozen or so entries like: Button 0 = 1;1;10000;3 # New The 10000 is the button id. To swap two buttons, exchange their "ids". Button 8 = 1;1;10032;0 # Prev In the example, you'd exchange 10032 in button 8 with the 10000 in button 0. (save a backup copy of buttons.ini before you edit it). For a full tutor on the v4 buttons as also used in v5: http://home.datawest.net/rookkey/opera/custom.htm Q: What are all the button ids in buttons.ini? A: We don't know them all, but here are a few more. We have no idea of the long term usage effect of these. 1;1;12024;0 # Prev Mail 1;1;12025;6 # Next Mail 1;1;12026;0 # Reply 1;1;12027;6 # Reply All 1;1;12028;2 # Forward email 1;1;12029;2 # Redirect email 1;1;12030;2 # Compose email # special buttons...and we don't know why. 1;1;13008;5 # www.psion.com 1;1;13007;5 # www.ibm.com 1;1;13006;5 # www.sun.com 1;1;13005;5 # www.browserwatch.com 1;1;13004;5 # www.news.com 1;1;13003;5 # www.be.com 1;1;13002;5 # www.myopera.com 1;1;13001;5 # www.operamail.com 1;1;13000;5 # www.opera.com Q. The icons on the Window bar take up too much space. Can I make them any smaller? A. In the active BUTTONS.INI file you are using, change the lines: [WINDOWBAR] Width = 21 Height = 19 Border = 0 to read: [WINDOWBAR] Width = 0 Height = 0 Border = 0 The icons will be gone and the Window bar will thin to the minimum height needed for the font used for buttons. You may set the font used in toolbars and the URL address bar by in: Preferences - Toolbars - Fonts & Colors - Normal Text option. [Cookies] Q: How can I edit my cookies? A: Use Josef Segur's freeware Opera File Explorer http://www.westelcom.com/users/jsegur/ Q: My secure login site says it doesn't remember me? A: There *may* be some sort of cookie bug. Try reloading the page after you press submit to log in. Not sure of a full work-around. Q: Where are cookies stored? A: \Opera5\cookies4.dat [Mice, Pointers, & Clicks] Q: Why don't links that worked in v4 and v3 work in 5.0? A: You must now RELEASE the mouse button before moving the pointer on web pages. In the email and news client, you only click once. Except on folders where you must double click and on menus where you only click down. Q: Where is the option to return to Opera's previous faster mouse behavior? A: There isn't one. Limited work arounds: If you have a 3 or 4 button mouse, define one of the buttons as a double click via it's mouse properties. It will get you "single shot" links, but not the right context menu. The right context menu can also be opened from CONTROL-M. Q: Can I use the 3rd and 4th button of certain mice? A: Not all mice conform to various standards. Some intentionally use non-standard methods. Those that do, will not work. Logitech Optical Wheel mice are working good with Opera. Tip: hold control on your wheel mouse and roll the wheel. [ Cascading Style Sheets ] One of the common themes in the news groups is that of people wanting and needing more information on Opera's usage of Cascading Style sheets. While there has been a single redundant question about them, there have been bits and pieces repeatedly come up. The following is a collection of various tid bits from sundry sources: - Opera applies specific CSS files for many of its internal displays. These CSS files are found in the \Opera5\Styles directory: Filename: Applied to: ----------------------- cache.css Window - Special - Cache. wml.css WML files. im.css Instant (ICQ) messenger files. opf.css Open eBook Package File. dir.css Directories (c:) drives.css Drives (opera:drives) history.css Window - Special - History. plugins.css Window - Special - Plugins. email.css Inbound email. csr.css ? about.css Help - About Opera. ------------------------------------------------------------------- [FAQ Legend & Glossary] Opera5\ : Refers to the file directory path to your installed Opera5. (default is c:\Program Files\Opera\ SC-Click : Hold Shift and Control, then press the action (left) mouse button. S-Click : Hold Shift while pressing the action (left) mouse button. Context Menu : The menu that is opened by right clicking (by Windows default, this is the right mouse button). opera.ini : Opera's configuration settings are controlled by a text file called "opera.ini". It is read (parsed) by Opera when the program is started. In Opera 5, that file is placed in your \Opera5 directory by default. Versions 3 and 4 would place this file in your \Windows installation directory. This file is often referred to simply as the "ini" when discussion Opera. You can find out more about the ini from Opera at: http://www.opera.com/opera5/operaini.html buttons.ini : Opera tool bars (iconic buttons) are controlled by the buttons.ini file that is found in one of the buttons directories. By default: C:\Program Files\Opera\Buttons\DefSmall\buttons.ini C:\Program Files\Opera\Buttons\Default\buttons.ini. CSS : Cascading Style Sheets (CSS). A language to control the display of HTML documents. Opera uses several CSS files to control its own internal displays for things like Email, Messenger, and file Directories. The default Opera CSS files can be found in the \Opera5\Styles directory. MDI Windows : (Multi Document Interface). A Windows standard implementation when a program contains "sub windows" within the main program space. The sub windows will not clutter up your windows task bar. Opera uses MDI windows to display multiple web pages and dialog screens. OS : In this context it refers to Opera Software; the folks who brought us Opera browser. http://www.opera.com