How do i make links invisible?

I make sheet music PDFs, then collect them together in a big file using Acrobat. In that new file i add internal links, for example in the table of contents to another page. I make them invisible rectangles.
Then i send the resulting PDF to my ipad. I use Forscore. In that app, all the links show up as green rectangles, the same areas i made links in Acrobat.
So, invisible in Acrobat, visible in Forscore.
In Acrobat, after searching, no apparent adjustments or preferences possible, afaik. In Forscore, also no preferences/view choices to be made regarding links.
I honestly don't know which app might  be the problem, but my experience suggests Acrobat.
Any ideas how i can make links truly invisible?
Using a macbook pro, late model, everything updated. Newish ipad, updated.

Screenshot attached, showing links [green] versus no links [normal text]. I would like very much for that green to go away.

Thanks in advance, for any information that might help me retain my sanity.