Replace an existing family
On desktop PowerPoint for Windows, Microsoft documents Home > Replace > Replace Fonts. Select the current family in Replace and the intended family in With, then apply the replacement.
Use the exact family names in the document. A font that looks similar is not necessarily listed under the same name.
Change the master’s font choice
For a template-based change, use View > Slide Master and the Fonts control. A master change applies through the slides that use that master; a presentation can contain more than one master.
If a deck combines templates, inspect each master rather than assuming the first one controls every slide. Microsoft distinguishes this desktop workflow from PowerPoint for the web.
Inspect layouts and text after the change
A replacement can change line breaks and the amount of text that fits inside a shape. Review long headings, tables, chart labels and emphasized words using the actual presentation.
For font installation and delivery questions, use the PowerPoint font guide. Replacing a family and preserving font resources for another computer are separate tasks.
Keep the design roles clear
A heading face and a reading face need not be identical. Use the presentation font collection to compare different roles before making a deck-wide choice.
Keep an unchanged copy of the deck when making a broad typography revision so the team can compare the resulting layout.
Your questions, answered.
Does changing one slide master cover every slide?
It covers slides using that master. A presentation with multiple masters needs attention to each relevant master.
Is Replace Fonts the same as installing a font?
No. Replacement chooses a family for existing text. Installation makes a font resource available to the application.
Sources & background
Sources supporting this page’s explanations. Practical examples are our editorial suggestions.