The application console has at the bottom 9 buttons. When the console window is narrow to fit all, the rightmost ones are hidden --without a hint that they are there.
I don't know if this is easy to do, but will post the idea.
1) Can the buttons be arranged in 2 rows when there is not enough space in one? Like:
[Run] [Halt] [Clear] [History] [State]
[Help] [Close] [Undo] [Redo]
2) If above is not possible, put some hint that there are more buttons, like an arrow to the right to scroll among them (will need a left arrow too when scrolled).