While most of what we need to accomplish to maintain and support Windows PC and Server systems is available via the graphical tools available via the Operating System, inevitably, the Command Line tools are still necessary or present an efficient method of generating information.  There are a number of Function Key shortcuts available within the CMD window that can be significant time savers, including:

F1 retypes the previous command one character at a time
F2 brings up a dialog and asks “Enter the char to copy up to:”
F3 retypes the last command in full
F4 brings up a dialog and asks “Enter char to delete up to:”
F5 same as F3
F6 Print EOF character (Ctrl+Z)
F7 brings up a dialog of all the recent command history
F8 brings up each of the most recent commands, one at a time
F9 brings up a dialog and asks “Enter command number:”