Tool to allow quickly changing the zoom factor setting. Normally, you have to
go through the Options menu to open the Program Setup/Preference, enter a new
zoom factor setting, and click OK. I found that I wanted the ability to quickly
change zoom factor on the fly as I'm working, because I've come to rely on the
zooming function using the mouse wheel to move around in drawings. When this
tool is invoked, it will display a small button bar with five buttons, each set
for a different zoom factor. Clicking one of the buttons once sets the zoom
factor to a new value and closes the bar. The values assigned to the buttons
are configurable by double-clicking on the word "Config." at the
bottom of the bar. On my systems, I assign a keystroke combinations of
"Shift + Z" to invoke this tool.
