[jochen]

I'm not sure.
Can I draw own polygons with straight lines or can I use only the shapes from palettes.

If I cannot create own polygons what can be the reason ?

Omnigraffle can draw complex shapes with help of bezier.

I need sometimes polygons like a combination of small and bigger rectangles but no line where both rectangles are connected.
In OG there ist a shape on palette with only 2 lines and I can use this to create my 2 different rectangles but this way is very circumstantial.

Jochen