...
The database is very large and you can usually find an icon that suits your needs. Simply type in a term related to what you want and choose the style you want on the left.
...
Once you have selected the Icon and save, you will need to reload the page in order to see it show up on the left side menu.
...
Editing Custom Data
Once you have created the custom data schema, you can then create new custom data items by viewing the menu on the left.