Here is a list of actions which can be triggered in the Midnight Commander filesystem browsing mode by using function keys on your keyboard.
F1
Displays help
F2
Opens user menu
F3
Displays the contents of the selected file
F4
Opens the selected file in the internal file editor
F5
Copies the selected file to the directory open in the second panel
F6
Moves the selected file to the directory open in the second panel
F7
Makes a new directory in the directory open in the current panel
F8
Deletes the selected file or directory
F9
Focuses to the main menu on the top of the screen
F10
Exits mc