One of the most common problems that PowerPoint users and presenters face is the substitution of PPT fonts. You may have taken care to choose the best and most readable font combination while creating slides on your computer but when you transfer the file to another machine, you lose the fonts you’ve used. This usually happens when you choose fonts that are not available on all computers. To avoid such a scenario that can mess up even the best designed presentations, it is important to embed fonts once you’re done creating the PPT. However, only TrueType Fonts (the ones in the font list with TT next to their name) can be embedded in PPT files.
How to Embed Fonts in PowerPoint 2003
Go to File>Save As>Tools> Save Options. In the Save Options dialog box, check Embed TrueType Fonts. For smaller PPT files and to turn off editing on other machines, check the Embed characters in use only option. To ensure editing on other machines, check the Embed all characters option. This will, however, make the files bigger and should be avoided unless you really need the files to be editable.
How to Embed Fonts in PowerPoint 2007
Go to Save As>Tools>Save Options> Preserve fidelity when sharing this presentation. Check the Embed fonts in file option followed by either all characters or characters in use only depending on whether you need the file to be editable or not.