Small text does not always require a new display setting. A browser may let you enlarge the page you are reading while leaving the rest of your desktop alone.
Choose what needs to grow
Mozilla’s Firefox help distinguishes controls for enlarging a whole page from text-only zoom. The exact controls depend on your browser, device and version, so use the documentation that matches your setup.
Whole-page enlargement affects more than the letters. Text-only enlargement focuses on text, although the resulting layout still depends on how the page is built.
Try one page and inspect the result
Choose a page without unsaved work. Increase the size modestly, then check a paragraph, a menu and a form label. Can you read them comfortably? Is any content clipped or difficult to reach?
Keep a note of the original setting so you can return to it. A page-specific adjustment and an operating-system display change have different scopes.
Report a layout problem precisely
If content disappears when enlarged, record the browser, zoom level and affected element. That is more actionable than saying the page looks wrong.
Use a clear technical problem report if you contact the site. Readability improves when the adjustment and its effects can be described separately.