The SiteManager platform has a standard font list with some popular google web fonts and system fonts.
If you like to add other custom fonts to the project there are 3 ways you can do so.
Go to the design home page and click custom fonts.
Google Web Font
If the google web font you need is not available in the SiteManager standard list you can easily add it.
Make sure Web Fonts is selected. Type in the font name and the include link to the font.
Read the full article about google fonts here: https://support.sitemanager.io/hc/en-us/articles/209407205-SiteManager-Design-Custom-fonts-and-pictures
A popular font-engine among designers is Adobe TypeKit. Select TypeKit font, insert your typekit id and add the fonts listed in your typekit id.
Read the full article about Adobe Typekit here: https://support.sitemanager.io/hc/en-us/articles/211979025-How-to-implement-Adobe-TypeKit-Fonts
Upload Custom Fonts
Select the Upload Font option and add your own (ttf, otf, woff, eot and svg) font files.
Read the full article here: https://support.sitemanager.io/hc/en-us/articles/115003508509-SiteManager-Design-Adding-custom-fonts
When your design has background pictures you can upload these files here and select them when you start styling later.