Blue small size dimensions ...

[hpannu]

While drawing any objects, Revit shows dimensions, angle etc. in a very small (almost unreadable) size. Is there a way to increase this size?

[beegee]

These are the temporary dimensions. They can be hard to see sometimes. No, you cannot adjust their size, but you can place "normal" dimensions to use to adjust sizes and locations if you need to. ( We sometimes do that too. )

[mmodernc]

You can click on the little "turn temporary into permanent dimension" symbol then select new properties like bigger text.