Modify a slide master
Open the document template or presentation that you want to change.
Switch on master view
In the ″Sidebar at ″Properties″ there is also the button for the.
Click on thebutton.
In the master view you can now choose the format, such as size, font and font color of all elements, such as headline, text and the fields of the footer, which should be visible on all slides of the template.
Now edit or change these elements according to your wishes.
Close Master View
Click on the ″Close Master View″ Icon" or on the Sidebar theButton.
Save master slide as a template
In the menu, click▸ ▸ .
In the ″Save as Template″ dialog box, select the category.
Enter the template name, e.g. "My new template".