1、You can edit on Dashboard or on Customize PAGE
Click into the Dashboard or
Click into the Customize page
2.Choose an icon that u prefer
U can click the Button at the bottom of the homepage, or
visit the website:https://github.com/solstice23/argon-theme to get the icons.
Then find the link in this page
Argon-Theme 文档 : https://argon-docs.solstice23.top
Then click the icon menu ,in this page,find out the link and click.This is a lib that offers icons and codes
3.Choose the icon you prefer and copy the codes
Stick the codes in front of your navigation label.
This one was editing on Dashboard.
And this one was editing on Customize page.
You can edit on any one of this two pages as u like.
END