F1 => Repeats the letters of the last command line, one by one
F2 => Displays a dialog asking user to enter the char to copy up to of the last command line
F3 => Repeats the last command line (Similar to DOSKEY)
F4 => Displays a dialog asking user to enter the char to delete up to of the last command line
F5 => Goes back one command line
F6 => Enters the traditional CTRL+Z (^z) (End-Of-File)
F7 => Displays a menu with the command line history (Similar to DOSKEY)
F8 => Cycles back through previous command lines (beginning with most recent). If first typing the beginning letters of a command, then it will cycle through the previous commands matching that prefix when pressing F8.
F9 => Displays a dialog asking user to enter a command number, where 0 is for first command line entered
Esc => Erase command line
Tab => Filename completion – cycles through all file names in current directory matching typed prefix
Up arrow => Cycles previous command line entries in backwards direction
Down arrow => Cycles previous command line entries in forwards direction
Right arrow => Repeats letter at a time from previous command line