[Ken Case]

Click on the right pane, then select Collapse All (keyboard shortcut Control-Command-0) to collapse all the items so you just see your list of projects. Print that list.

Alternatively, select Page Setup from the File menu (keyboard shortcut Shift-Command-P) and switch to the OmniFocus settings, where you'll find options to Collapse All, Leave As Displayed (the default), or Expand All. Select Collapse All, accept the new settings by pressing OK, then Print.

Hope this helps!