Comment on page
The icon widget lets you add icons to text fields or labels. Select the icon widget and drag it to your canvas to a location where a green line appears, this means you can place a icon there. It can not be dropped directly onto the canvas but needs to be within at least an "active" element (like a Rich Text element).
When you add an icon a menu pops up with the different icons available in the modeler where you can choose the icon you want. Then you can set a color along the available Context options, and optionally set a Size (in numeric value for Pixels).