The UX > Options section of the editor is a great tool for making changes to what your users can see and how they see it in your app's forms and views.
In addition, you can choose from a set of available fonts and decide which size font to user.
In addition, you can choose the launch page for your app in this part of the editor.
Changing fonts and font sizes
Using the UX>Options tab, you can choose from a set of available fonts and also modify the font size. Currently your default font is set to Rubik.