First Method (Recommended)

If the menu item you'd like to add is a page, add menu field to its Front Matter:

menu: 
    main:
        name: title (optional)
        pre: icon
        weight: -90

Second Method

Menu setting is placed under menu section of config.toml

[menu]
    [[menu.main]]
        identifier = "home"
        name = "Home"
        url = "/"
        weight = -100
        pre = "home"
    [[menu.main]]
        identifier = "about-cn"
        name = "About"
        url = "/about/"
        weight = -90
        pre = "user"
    [[menu.main]]
        identifier = "archive"
        name = "Archive"
        url = "/archive/"
        weight = -70
        pre = "archive"

• identifier: Item ID

• name: Display text

• url: Link

• weight

• pre: Specify which SVG icon should be used

If pre is set to archive, theme will look for archive.svg under assets/icons folder.

Add custom icon

This theme comes with some SVG icons from Tabler Icons. You can find them under theme folder assets/icons.

If you want to include more icons, just download them from website above, and place them under assets/icons folder of your Hugo site.