Ron,
See Below.
To assign the macro: right-click any toolbar. Select Customize. On the
Commands tab select 'Macros' from the left-hand list, and then your macro
from the right-hand list. Drag it your toolbar of choice.
To make it toggle, edit the macro code to something like
selection.Font.Hidden = not selection.Font.Hidden
Did you know that the Show/Hide Button (¶) in the standard toolbar can
toggle all hidden text visible and not visible? And that hidden text will
not normally print unless that particular option is selected beforehand
under Tools | Options | Print? Sometimes PrintPreview mode will show less
total pages than the other view modes because it repaginates without the
hidden text taking up space.
One useful function of hiding certain parts of text is to exclude that
hidden text from being used in a sorting process. After the sort is done,
you might choose to change the hidden text back to regular text.