Add an icon for the application to
/usr/share/icons/theme-name/icon-size/apps.
For more information on icons and themes, see Section 3.6 ― Installing Icons for Themes.
If the application uses a new MIME type, add a source XML file
to the MIME database. For more information, see Section 5.4 ― Modifying MIME types.
If the application uses a new MIME type, add an icon for the
MIME type to
/usr/share/icons/theme-name/icon-size/mimetypes.
For more information on icons and themes, see Chapter 3 ― Installing Themes.