Quick answer
The biggest mistake with font size is using an extreme value because it looks good for a moment. Test readability over a real page instead.
Very large type can create short lines and more page turns.
Mistake 1: changing too much at once
Change one setting, read, and compare. If you change four settings together, you cannot tell which one caused the problem.
Mistake 2: copying another person’s setup
Different screens and different eyes need different settings.
Use examples only as a starting point.
Mistake 3: judging from a preview
A clean settings preview is not the same as a dense chapter, table, footnote, or long paragraph.
Always test on real material.
Fix
Reset to a normal preset, then add back only the changes you can explain.
If one change clearly helps, keep it and leave the rest alone.
Detailed troubleshooting checklist
Work through the problem in this order: first check font size itself, then the app, then Android or the device. Keeping that order prevents you from changing many things when only one part is wrong.
- Change one setting at a time.
What to remember
The answer does not need to be complicated. The useful result is that you can avoid settings that make reading harder even when they look attractive at first without repeating the same setup every time.
Change one variable, then read normally
For “Font size: common reading mistakes to avoid”, return to a plain baseline before tuning. Change the biggest source of discomfort first, then read long enough to notice whether the change helps or simply looks different.
- For “Font size: common reading mistakes to avoid”, read for at least several minutes before deciding that a new size, margin, or color is better.
- Use the lighting you normally read in; a comfortable daytime palette may be too bright at night.
- Keep a simple default preset you can return to when an experimental setup becomes uncomfortable.
What a good result looks like
For “Font size: common reading mistakes to avoid”, the page should feel easier after a real reading session, not merely look more customized in a screenshot.
For this guide, stop adjusting once the workflow for “Font size: common reading mistakes to avoid” is clear, repeatable, and easier than the problem you started with.