This command is only available when the Tablet Entry option is checked under the Options menu. When Tablet Scale is selected the Tablet Scaling window displays.
Type in the coordinates of the three scaling points in the appropriate textboxes and press OK. When prompted, pick each of the scaling points with the Enter button on the cursor. The confirmation window displays the new scale.
Press OK to accept to Rescale to enter the points again. If scaling to benchmarks, select the Use Benchmarks checkbox and Press OK, then select each benchmarks in their 1, 2, and 3 order.
Also see: Adding_Benchmarks