Galaxy tab s9 android font view is not sharp enough

Hello,

I use acrobat reader for samsung. My problem is the font view is not sharp enough. That reduces the readibility of the text. Although I can't increase the font size (except for zooming), at least I expect to increase thickness of the fonts so I can read it through less effort. In current case the font appearance is very thin. Particularly this problem occurs when I read academic papers which are usually have written through Latex software and have a different kind of font.

I know there is a reading mode but it is not handy if the pdf has lots of equations.

I hope there is a solution for it.

Thanks in advance.