Right-click the folder you want to add an Emoji title to
3
Click "Rename"
4
Right-click in the text field and select "Emojis and Symbols". Find an emoji you want to use.
5
Click "OK" to save. \
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REMINDER: Your folders, if organized alphabetically, will alphabetize based on the name of the emoji (if the emoji is the first thing in the title like below.)