Ruler use on PDF files, Ipad
I have a question regarding using the ruler provision on a PDF file on my Ipad.
Once I click the ruler, it comes on for a few moments, before it auto-deselects. I would like it to stay permanently on the screen until I manually de-select it. How do I do that?
And FYI, I am using the most updated software.
iPad Air, iPadOS 16