Use annotation and drawing markup tools to add comments and drawings.
You can use the drawing tool to add a rectangle, ellipse, or other shape and then type a message in the associated pop-up note.
To add a shape:
1. Open a PDF.
2. On the toolbar, select a shape.
Optionally, use the Free draw tool to draw a custom shape.
3. Click where you want the shape inserted. Drag and drop to resize the shape.
4. Double tap the shape to type your comment in the associated pop-up note.
To add a Note:
1. Open a PDF. Tap the Note icon.
2. Click where you want the note inserted.
3. Type your comment in the associated pop-up note.