I have Finale 2011. There is a part that would be easier to read if
I print it without a key signature (as in C Major). I followed the
Finale Internet instructions - to the key sig. tool, marking it
properly (Hold notes to original pitches), - but nothing happens.
The present signature
On the part, with the Staff Tool selected, click on the staff to bring up
Staff Attributes. On this menu select Independent Elements: Key
Signature. then change the key signature as you described.
If it is a linked part, the change will be reflected in the score. If this
is not what you wish,