Hiding thumbnails when annotating iPad .pdf files

I keep touching by mistake the page thumbnails when using Apple Pencil on .pdf files in the Files app (iPad). This causes the current page to change... The problem is that the thumbnails are on the right of the screen and I use my right hand to write (I touch the thumbnails with the side of my hand when writing).

Is this just an issue of mine? Is there a way to move or hide the thumbnails when using Pencil?