Step 2: After downloading fonts, decompress and add fonts to the system.
There are two ways: one is to paste the font into the C:WINDOWSFonts folder;
The second is to open the control panel, find "Appearance and Theme", and then double-click to open it.
On the left of "Appearance and Theme" is: Font. Double-click the font to enter the font folder.
Paste the downloaded fonts into this folder.
The third step is to open PPT, and then you can call this font in PPT.