How to mark up and annotate content.
You can interact with the activity page using the toolbar at the top.
You can use the + and - icons to zoom the page in and out.
The highlight tool allows you to highlight text.
The underline tool allows you to underline text.
The strikethrough tool allows you to strikethrough text.
The squiggly underline tool allows you to squiggly underline text.
The free text tool allows you to add notes to the page.
The rectangle tool allows you to draw boxes around content.
The freehand tool allows you to create freehand notes
The freehand highlight tool allows you to freehand highlight.