#1:
I was following the instructions in the help: Creating and Distributing Custom Toolbars (Pro only)
But toolbar editing doesn't work well.
When I try to add a button, sometimes I get a couple of buttons added, sometimes no buttons, and sometimes invisible buttons.
So, I added "Sample button" - that works.
When I add a button, it seems to get added but is usually invisible.
Then, change the ButtonSize, and now the buttons appear to get fixed.