Goodnotes: Highlighting with the Highlighter Tool
1. Select the Highlighter tool and draw over any words or objects on the page to highlight them.
2. Pen, Highlighter, and Shape tools each have their own set of shortcuts for colors and thicknesses in the contextual section. Tap any of these slots to change the color or the thickness and double-tap to access more.
3. Tap twice on the tool to access its settings.