It’s me - Muse Theme based on standart Adobe Muse widgets.
If you do'not know how to edit standard widgets be sure to check tutorials section on the support website https://helpx.adobe.com/muse.html
If you do not have enough time to it, be sure to check the article “Work with composition widgets”. Composition widget is most frequently used widget in theme, which is used on each page. https://helpx.adobe.com/muse/using/composition-widgets.html