How do I change the navigation bar in Google sites?
You can add any page on your site to your horizontal navigation bar as a menu topic or menu item. Once you are in the “Edit site layout” mode, click on the region that says “Click to edit horizontal navigation.” This will bring up a dialog to add, change, and remove the items in the navigation bar.
How do you change the master in Google Slides?
Open the Slide menu, then select Edit master. The presentation will switch to the master template editor. Be sure to select the master slide at the top; otherwise, one of the layouts will be selected by default. Make the desired changes to the master slide.