Unfortunately that's how it's designed to work. If you open a file which
contains tracked changes or comments the bar will automatically launch, but
if neither are present it not only won't launch but will be taken away.
There is no Preference setting to change the behavior. If you have a
complaint or request on the issue use Help> Send Feedback to submit it
directly to Microsoft. They do monitor that data closely.
In the meantime, if the shortcuts for launching the bar are not sufficient
you might consider creating your own replica of the Reviewing Toolbar with
whatever controls you want it to have. Alternatively you can add the
preferred controls to a different toolbar. Custom toolbars or built-in
toolbars will remain displayed regardless of whether there are changes or
comments in any document you open or create.
HTH |:>)
Bob Jones
[MVP] Office:Mac
