Sorry, I tried, but I couldn't understand the question.
If you are talking about magnification in full-screen preview, a click zooms to the current zoom level, which is 100% by default. Pressing + or - increases or decreases this magnification in additional zooms of 200%, 400% and 800%. There are no other amounts, and this is not user-configurable.
Thank you very much for your answer.
I'm sorry, I think I told confused.
As you said, the zoom rate of 100%, 200%, 400% and 800% as I know.
However, these rates are forcing me. I want to grow from 50%.
I understand that there is such an option Bridge: (
Is not it possible to develop?