Are they real?

[birdie dkart2 asu pstu ac ru (Artem S. Tashkinov)]

For the years of working with MC I've learned some key combinations
Alt-R: makes MC to move a cursor to the middle of the current panel
Alt-T: changes the way MC shows the current panel
Alt-P: lists history lines
Alt-A: extracts current directory path
Alt-H: calls MC history
Alt-O: kinda synchronozation of panels (like Alt-F1(F2) in Norton Commaner)

do people know about them and are they documented?