Use this command to display a four-headed arrow so you can size the active window with the arrow keys.
After the pointer changes to the four-headed arrow:
1. Press one of the DIRECTION keys (left, right, up, or down arrow key) to move the pointer to the border you want to move.
2. Press a DIRECTION key to move the border.
3. Press ENTER when the window is the size you want.
Note: This command is unavailable if you maximize the window.
Shortcut
Mouse:
Drag the corners or edges of the window.