Up‑arrow, Down‑arrow, or ^

All

Used to navigate and retrieve a command from the command history.

Tab

UNIX

Serves for word completion.

Ctrl+D

UNIX

With the cursor positioned at the end of the line, displays a list of words that match the word completion string in the command line.

With the cursor positioned anywhere else on the line, deletes the character to the right of the cursor.

Esc, Esc

Ctrl+2

UNIX

Displays the help text for the command in the command line. All the text in the command line is preserved, so that you can continue typing the command from where you left off.

F1

Windows

Inserts the previous command, character by character.

F2

Windows

Displays a window with the instruction: “Enter char to copy up to:” When you enter a character from the previous command, selang enters the command up to the first instance of the character. If the character occurs more than once in the command, you can press F2 again to insert up to the next instance.

Use Backspace to cancel.

F3

Windows

Enters the previous command (same as up arrow).

F4

Windows

Edits the previous instruction. Displays a window with the instruction: “Enter char to delete up to:”

Use Backspace to cancel.

F5

Windows

Enters the previous command (same as up arrow).

F6

Windows

Enters a Ctrl Z (^Z) in the command line. This allows you to press Enter and continue entering the command on the next line.

F7

Windows

Displays a window listing the command history. You can use the up and down arrows to select any previous command.

Use Esc to cancel.

F8

Windows

Enters the previous command, as the up arrow does, but with the cursor positioned at the beginning of the command line rather than at the end.

F9

Windows

Displays a window with the instruction: “Enter command number:” The number you enter inserts the command with the corresponding number in the F7 listing.

Use Esc to cancel.