Here I am going to explain 17 options in AutoCAD or 17 commands in Auto Cad which we can use simply press Ctrl +

CTRL+0 CLEANSCREEN Turns user interface elements on/off
CTRL+1 PROPERTIES Turns properties on/off
CTRL+2 ADCENTER Turns design center on/off
CTRL+3 TOOLPALETTES Turns tool palettes window on/off
CTRL+8 QUICKCALC Launches calculator window
CTRL+A   Select all
CTRL+C COPYCLIP Copies objects to clipboard
CTRL+H   Turns a group on or off
CTRL+J   Repeats last command
CTRL+N NEW Opens create new drawing dialogue box
CTRL+O OPEN Opens the select file dialogue box
CTRL+P PLOT Opens the plot dialogue box
CTRL+R CVPORT Switches between viewports
CTRL+S QSAVE Opens the save drawing as dialogue box
CTRL+SHIFT+ S   Save as
CTRL+V PASTECLIP Pastes data from clipboard to drawing
CTRL+X CUTCLIP Removes select object from drawing to clipboard