Keynote application uses the preset fonts installed with IOS.So true custom fonts, non-Microsoft fonts, are not available. The dynamically installed fonts on iOS are only “Office compatible” fonts, or fonts from Microsoft.So a slide with a font not currently installed (but a Microsoft font) may initially display with a font substitution, and while you are looking at it, change to the correct font that has been downloaded and added to PowerPoint’s font library. Then in the background, if the device has online access, the additional fonts are downloaded, installed and the presentation is dynamically updated to use the fonts. The presentation opens and if the font is not currently installed on the iOS device, a substitute font is automatically used. Microsoft has recently implemented a new dynamic font library that will download and install additional fonts if they are used in a presentation.PowerPoint for IOS installs with selection of preset “safe” fonts that are available on all platforms.iOS uses TrueType (.TTF) and OpenType (.OTF) fonts.Custom fonts can be download and installed, but not all apps can use/see the custom fonts.Keynote dynamically recognizes newly installed custom fonts and are immediately available without restarting the app.If a font is installed while PowerPoint is open, it will not show up in the font list until it is restarted. PowerPoint needs to be opened, or restarted, AFTER the custom font is installed.The Mac OS fonts cannot be used on Windows computers.PowerPoint and Keynote can use TrueType (TTF), OpenType (OTF), and PostScript (PS) formats.A few notes about PowerPoint and Keynote using custom fonts on the Mac OS:

Font book mac ppt