# Icon Sets

The Icon Set system allows you to create a custom icon set that can “drop in” and replace, or augment, the internal set of toolbar icons. A list of installed icon sets can be viewed in Preferences on the [Toolbars / Icons](../preferences/preferences_categories/toolbars/toolbar_icons) page.

An Icon Set is distributed in a **.dis** file, which is a normal ZIP file with a **.dis** extension. Inside the **.dis** file is an XML file that defines the icon set, and one or more image files that contain the actual image data for the icons. Any image format supported by Directory Opus can be used.

More:

[Icon Set XML Definition File](icon_sets/icon_set_xml_definition_file)\
[Icon Sizes](icon_sets/icon_sizes)\
[Icon Names](icon_sets/icon_names)\
[Icon Display Names](icon_sets/icon_display_names)\
[Icon Categories](icon_sets/icon_categories)\
[DPI aware Icon Sets](icon_sets/dpi_aware_icon_sets)\
[Localization](icon_sets/localization)\
[Icon Images](icon_sets/icon_images)
