An icon is from a set available in the builder
In the properties, you can specify the icon size and color and choose the icon itself from the provided sets.
|size||Icon size corresponds to the font size|
|icon||The icon name in a particular set. You can see a complete list of icon names on the official website of the desired set or you can find out the name of the desired icon by selecting it in the builder|
|color||The icon color corresponds to the color style property|