Goodnotes: Using the Pen Tool
1. Select the Pen tool from the toolbar, you can write on the page with a stylus or your finger.
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.