Click "Insert Slide Master" on the Slide Master tab. Insert a specific layout in your presentation by clicking on the "New Slide" button on the Home tab and choosing the slide layout from the options.

You can also insert a shape or logo on a slide master, and it will show up in all the slides with the same layout. The Slide Master feature in Microsoft Power helps with the consistency of your ...

Formatting should always be either the last or the first part. Doing it at the end ensures you are past your final content, and all you need to do is make it look right. So follow the steps to ...

Choosing File > New in Keynote opens a theme chooser; a collection of templates that have distinctive design styles ... because using Master Slides is the best way to enjoy a pain free life ...

Click the downward-facing arrow below "New Slides" in the Slides group on the Home tab. PowerPoint displays a list of available slide layouts ... How to Create a Master Slide in Powerpoint.

Google has a support doc available here that will walk you through everything you need to know about editing master slides and layouts for themes.