Marcus Bergmann writes:

how can i change the look and contents of the manage_tabs on my own administrative interfaces using <dtml-var manage_tabs> Its source is in ".../App/dtml/manage_tabs.dtml".

I see two options (for you): 1. change the source to your taste 2. copy the source, adapt it as you like and use the result in your templates in place of "manage_tabs". Dieter