This really eerks me. When you have your scale set to what you want and the "Fixed" checkmark box checked, you can not change your viewport. This is really unnecessary and very annoying.. I always have to go through these steps to duplicate a paperspace tab...
1. Duplicate PaperSpace Tab
2. Double Click on Viewport
3. Uncheck the "Fixed" Checkmark Box
4. Select Desired Vieport from View Name Drop Down List
5. Click on OK
6. Double Click on Viewport
7. Type in my Desired Scale
8. Checkmark the "Fixed" Checkmark Box
9. Click on OK
There has to be a simpler way.
AutoCAD Turned TurboCAD User
TurboCAD DeLuxe V20, V21, 2015, 2016
TurboCAD Pro V17, 2015
TurboCAD Pro Platinum 2016