The 'History List' screen displays a list of the last 100 operations. The most
recent operation is at the bottom.
The value which was entered, the operation, and the resulting value
(top of stack) are displayed.
The display can be scrolled one operation at a time by selecting the up
or down arrow, or one screen at a time by selecting the area directly
above the down arrow or the area directly below the up arrow. This
is pretty crude scrolling (sorry for that), and I plan to update this
in the future.
Registered versions:
Selecting any value in either the 'entered' list or the 'top of stack'
list will copy that value to the display.
The history list may be reset using the 'clear' button.