Option for fixed orientation

[opk12]

Is your feature request related to a problem? Please describe.
Auto-rotate sometimes triggers when I put the phone on the table and pick it up, because it is covered with documents. This creates an unpleasant effect, and I prefer using the portrait mode for the calculator.

Describe the solution you'd like
Is it possible to have an option to fix the orientation to Portrait?

Describe alternatives you've considered
I want to keep Auto-rotate enabled, as I use most apps with the phone in the hand.

[inson1]

so option to choose Orientation in settings with these 3 options - System, Portrait, Landscape and System would be set by default