I have set up
a DrGeoII development environment. 
How do I get at the main menu, e.g. to open a new sketch?
From the INSTALL information file:
7. You can browse the code with the source code
browser and open new
Dr. Geo window by editing "DrGeo new" and performing a do-it
If you activate the DrGeo menu, you will not have
the Pharo menu...
You do it by executing "DrGeoSystem
beWorkstation", you revert with "DrGeoSystem beDevelopment"