Download the font file
Extract the font if it is in a ZIP or RAR file
Open the font file
Click Install
Or right-click the font file and select Install
On Windows, drag the font file into the Fonts folder in Control Panel or Settings
On Mac, double-click the font file and click Install Font in Font Book
On Linux, copy the font file to the .fonts or .local/share/fonts folder
Restart the app if the font does not appear
Restart the computer if needed