Useful function keys

F1  Help which is context sensitive to current command

F2  Toggles window display of command line history

F3  Toggles Osnap on or off - Hold shift key + right mouse for drafting settings to see osnaps available

F4   Legacy digitising tablet calibration

F5   Isometric plane toggle - Set isometric snap in drafting settings

F6   Not operative

F7   Grid display on and off toggle

F8   Ortho mode on and off toggle

F9    Snap mode on and off - Turn off if your cursor starts to jump around the screen

F10  Polar on and off toggle - Drawing at set angles

F11  Object snap tracking on and off - See otrack

F12  Dynamic input mode on and off - Input box display, display may be smoother if turned off