How to increase UI Size

How do I increase the UI settings? Right now the font is so small that it’s nearly impossible to read. Please help.

If you’re referring to UI’s created by a server, it’s entirely on them to scale it for other resolutions. However, if they don’t there’s a setting in FiveM that was added called Fixed-size NUI you could try. FiveM → Settings → Game → Fixed-size NUI toggle it on.