The Calculator has five miscellaneous functions, shown in Figure 8-8.
Backspace (Bsp) deletes the rightmost character of the current display and recalculates its value.
Keys changes the display of the Calculator keys to show the keyboard equivalents of each Calculator key for mouseless operation of the Calculator.
See the section "Calculator Function Keys", or the calctool manual page, for more information about the Calculator keyboard mapping.
Accuracy (Acc) chooses the number of digits of precision used in the calculator display. This key has a pop-up menu associated with it, which lets you specify 0 through 9 radix places. The default value is 2 radix places.