The eraser lets you erase digital ink and highlighting from the page. Simply drag your finger or stylus across the ink that you want to erase.
You can set the eraser radius by tapping one of the options on the right-hand side section of the toolbar.
The Eraser tool also supports some smart settings that will allow you to speed things up. The settings can be accessed by tapping the Eraser tool again while it's selected.
This clears the whole page. This action is undoable.
Erase Entire Stroke
By default, the tool erases only the parts of the ink that are within the eraser radius. If this setting is enabled, it will erase whole strokes instead.
Erase Highlighter Only
If you want to only erase highlighter but not the written words under it, you can use this setting.
If activated, GoodNotes switches back to the last used tool as soon as you lift your finger/stylus from the device.