Is it possible to make your own custom 'common shape' rather than use one of the pre-made ones?
Where are these objects saved?
I've done this using a macro. Create the shape first and save to a specific file. Create a macro to import that shape. Create a custom icon for it too.
1. Stop Sign shape (Octagon from the polygon tool isn't rotated correctly)
2. Triangle - with point at the bottom.
3. Arrow - my arrow
4. 3/8" circle (common hole for signs)
5. Windhole for banners
6. Grommets for banners