Normal vision problem

Hello, I have a problem with my catia software that is becoming quite tiring.

When I want to make a normal view in relation to a plane, the view is no longer perfectly normal but with perspective. I had to modify something on the software without meaning but after looking for hours I can't find it... could someone please help me

Thank you:)

Hello

If you are talking about a view in a workshop other than the drawing workshop, you have to go to the View \ Rendering Style menu and choose parallel

Thank you very much it works