These tools are accessible from the top Insert menu:

​
Brush

Freehand tool with adjustable size. Useful for rough markup, masking, or collaborative notes. Adjust size with bracket keys [ and ].

​
Text

Add and format editable text layers using Google Fonts.

​
Comment tool

Used to leave comments for collaborators.

​
Rectangle / Ellipse / Line / Arrow

Used for annotations, diagrams, or layout prototyping