<p>Applications can install add-ons so they can be invoked easily on a selection of files from Tracker. Only the add-ons that can handle a specific filetype are presented under <i>Add-Ons</i> from the context menu or the <i>File</i> menu of a Tracker window. Some add-ons don't necessarily need a file to work on and are thus always present.
</p><p>Tracker Add-Ons, or links to applications that can act as add-ons, can be installed in three different locations (see topic <ahref="filesystem-layout.html">Filesystem layout</a>):
</p><p>The file name of an add-on can be suffixed with a dash and capital letter, and is then available via keyboard shortcut. For example, <i>Open Target Folder-T</i> opens with <tt>ALT+AltGr+T</tt> (at least with my keymap, you may have a different key combination).<br>
Of course, you have to take care of possible shortcut collisions when deciding on a shortcut. You can't have the same for different add-ons.
<tdvalign="top">Opens the Background preferences to change the color or image of the Desktop or any folder. Invoked on an image file the Background panel is launched with that image already loaded as a potential background.</td></tr>
<tdvalign="top">Invoked on a file, opens its specific <ahref="filetypes.html">FileType</a> panel, otherwise the FileTypes preferences are launched.</td></tr>
<tdvalign="top">A selection of files will be added to a zip archive, invoked without a selection opens a panel to create an archive via drag&drop.</td></tr>
