What happens to my theme if changes that affect themes are made using Page Composer or Page Template Composer?
Application changes made using Page Composer or Page Template Composer overwrite the changes made using the Appearance work area.
Caution: Before using the Appearance work area to change the
look of your application, you must undo any changes affecting the
theme done using Page Composer or Page Template Composer. Otherwise,
the changes that you make using the Appearance work area may not show
up in your application as you wanted.