How to change the perspective scale in CATIA V5

I'd like to change the scale of the perspective view in CATIA V5, but i just can't find out how. I know it can be done, because i've done it once accidentally, and could't use the perspective view because everything looked like i was useing a very wide-angle fisheye camera. Had to reinstall to get back the normal view.
6 Answers

click on your part,for example be in part design,then change to digitized shape editor,then find,then find veiw modifications or press F2 key,with that circle u can change the prespective

Before you reinstall the whole prg, you should delete the Environment-file personalized for each user. This should fix nearly every, I will try this and that and don't know how to get back. ;-)
Best regards