Help adjust font size

[rumeysanurtorun]

Hello, I am developing an application. I want to change the font size in the settings section. I guess it doesn't apply to the entire application. How can I make changes, even for a single page?

[Kevinkun]

One key for all label/buttons font size changing?
you can use the "for each item in list" block and "every Label" block.

location of "every label":