You can change the look of author profiles from "Customize" in the app menu. The settings are shared across all authors and all templates.
(1) Open Customize
From Shopify admin, go to Apps and open "RuffRuff Author Profiles." Select "Customize" from the app menu.
(2) Change the settings
Change the settings in "Profile," "Color," and "Layout." You can check the display in the preview on the right.
(3) Save
Select "Save."
Prerequisite: Only the app block "Title" can be changed per template in the theme editor.