Themes

activeCollab lets you change the look and feel of the application without changing any core files. To do this you can use activeCollab Themes:

One interesting fact about themes is that every user can have a theme of their own, which they can select from the Change Settings page in their profile area. Administrators can also select a default theme that is automatically used when new users are created. When the default theme is changed by an administrator, all user specific settings are dropped and every user's theme is reset to the default one.

Besides the themes that are shipped with activeCollab ('Sandbox' and 'Default') you can use also use any custom themes that you've created.