Oppo
Adjust Display Size auf Oppo
Font size only changes text. Display size on Oppo phones scales the entire interface, including app icons, images, and layout spacing, which is why menus can look cramped or oversized even when text is set correctly.
This setting controls how much fits on the screen at once. A smaller display size fits more content and smaller icons, while a larger display size enlarges everything but shows fewer items per screen.
Change display size on Oppo
Go to Tap on Settings ➔ Tap on Display & brightness ➔ Tap on Font & display size ➔ Set the Display size ➔ Tap on Apply.
The screen shows a live preview as you move the slider, so you can check how icons and text scale together before confirming.
If only the text looks wrong and icons are fine, adjust the separate font size slider on the same screen instead of the display size.
Some apps with fixed layouts may not scale exactly the same way as system menus and the home screen. If an app looks unchanged after adjusting display size, that app is likely rendering its own interface independently of this system setting.