The Extension Manager installation dialog allows to set the following extension configuration variables:
Default configuration settings: let you choose a set of default Page TSConfig and User TSConfig settings; select Typical (Most commonly used features are enabled. Select this option if you are unsure which one to use.) for the typical site requirements; select Minimal (Most features disabled. Administrator needs to enable them using TypoScript. For advanced administrators only.) for minimal settings; select Demo (Show-off configuration. Includes pre-configured styles. Not for production environments.) to explore some of the available features; default value is Typical;
Enable images in the RTE: if this boolean variable is set, the use of images in the “Minimal” or the "Typical" default configuration of the RTE will be enabled.
Enable the DAM media browser: if this boolean variable is set and if the DAM extension is installed, the DAM media browser will be used by the Insert image dialog;
Enable links accessibility icons: if this boolean variable is set, accessibility icons will be added in front of links. See Page TSConfig property RTE.classesAnchor;
Maximum width of plain images: Maximum width in pixels of plain images inserted with the TYPO3 image browser; default value is 640; this variable is DEPRECATED: use Page TSConfig property buttons.image.options.plain.maxWidth;
Maximum height of plain images: Maximum height in pixels of plain images inserted with the TYPO3 image browser; default value is 680; this variable is DEPRECATED: use Page TSConfig property buttons.image.options.plain.maxHeight;
Enable Mozilla/Firefox extension: if this boolean variable is set, the triggering of installation of a browser extension to allow the RTE to access the clipboard will be enabled; the feature will trigger the installation of Mozilla/Firefox extension AllowClipboard Helper from mozilla.org; default value is 0;
Url of AllowClipboard Helper: the full absolute Url of the AllowClipboard Helper extension for Mozilla/Firefox;
Enable troubleshooting mode: if this boolean variable is set, a troubleshooting log will be displayed below the editing area; default value is 0;
Enable compressed scripts: if this boolean variable is set, the compressed version of the editor scripts will be used; default value is 1; disabling compressed scripts is useful only in troubleshooting mode;
Force Aspell command mode: if this boolean variable is set, the Aspell command interface will be used; this may be useful when PHP is compiled with pspell, but with an old version of Aspell, and a newer version is available in another directory; if set, PHP safe mode should NOT be enabled; default value is 0;
List of htmlArea plugins: this is the list of htmlArea plugins that may be enabled; default value is “TableOperations, SpellChecker, ContextMenu, SelectColor, TYPO3Browsers, InsertSmiley, FindReplace, RemoveFormat, CharacterMap, QuickTag, InlineCSS, DynamicCSS, UserElements, Acronym, TYPO3HtmlParser”; note that plugins TYPO3Browsers, UserElements, Acronym and TYPO3HtmlParser are not available when the editor is used in the TYPO3 front end.
If the SpellChecker is not enabled, then the remaining configuration variables are irrelevant; note that if extension sr_static_info is not installed, SpellCheker will not be enabled.
List of Aspell dictionaries: the list of dictionaries available to the htmlArea SpellChecker plugin; this list is used only if safe_mode is enabled; if safe_mode is not enabled, the list is automatically obtained from Aspell: default value is “en”;
Default Aspell dictionary: the default dictionary to be used by the htmlArea SpellChecker plugin; this should be set to the default language of the site; default value is “en”;
No spell checking languages: the list of languages for which Aspell does not provide spell checking (see Unsupported Languages) and for which the htmlArea SpellChecker plugin will therefore be disabled (not shown in the RTE tool bar); default value is “ja, km, ko, lo, th, zh, b5, gb”;
Aspell directory: the server directory in which Aspell is installed; default value is “/usr/bin/aspell”.