If you enable AutoCAD Dynamic Input, you see on-screen prompts near your cursor as you vectorize. Vectorized lines, arcs, and figures also have grips that you can use to edit the line work. This feature is particularly useful for providing numeric values for coordinates, line length, and angle. When Dynamic Input is disabled, the prompts appear only on the command line.
To configure the pointer input and the dimension input, use the AutoCAD command DSETTINGS to open the Drafting Settings dialog box.
To turn Dynamic Input on and off, use the AutoCAD system variable DYNMODE, which has four settings:
See AutoCAD Help for more information on Dynamic Input.