Hi,

I'm the Fedora dia maintainer and I received the bug report below, which I believe is best handled upstream, for the original report see:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=243314

I verified that this still happens with 0.96.1 I think this is best fixed by putting all the advanced settings stuff under the divider line (fonts and colors) on a separate look/preferences tab, maybe even somewhere completely else, as I believe this should be per diagram options and not per class.

Either way I must say that having these settings where they are now, distracts from the main purpose of the UML shapes, which is modeling not selecting fancy colors.

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Description of problem:
If you are using resolutions of 1024x768 or lower in Dia, you cannot use the
properties dialog for UML, as the okay and cancel buttons are off the bottom of
the screen.  The window is also not resizable to adjust for this.

Version-Release number of selected component (if applicable):
dia-0.96-1.fc7

How reproducible:
Seems to happen on any system where the resolution is 1024x768 or lower.

Steps to Reproduce:
1. Set resolution to 1024x768 or lower.
2. Open the properties dialog for UML
  
Actual results:
Cannot click the ok and cancel buttons, they are off the screen.

Expected results:
The dialog to fit the resolution.

Additional info:
This isn't anything too major, its just rather inconvenient, as I cannot use the
program effectively on my laptop, which cannot go above 1024x768.