for F5 (copy) formPress F5 a second time to select just the file name without path, and third time to select also its extension. Ctrl+Home places the cursor directly in front of the file name (behind the last "\").
And practice shows that it's also working: F4 - this opens the first combobox, F6 behaves like F5, F10 - opens 'directory tree ' (also it's strange that button has name 'Tree' in this case and not 'F10 Tree' - by analogy to the one on the left: 'F2 Queue')
Maybe we have another hidden supported shortcuts here?
The same for F6 (move) form. Quote from HELP:
So we have here a 'vice-versa' situation. F6 was mentioned, but F5 - which behaves like F6 - not. And the same for F10. And for Ctrl+Home.Press F6 a second time to select just the file name without path, and third time to select also its extension.
Concerning 'F10 Tree' - as I understand it, I can’t even fix it for myself, because in the language string resources there is only a translation of a word / command 'Tree' (like 'Queue' for F2), and the keyboard combination seems to be substituted by the internal code.