Open your Google Slides presentation
Select the slide where you want to draw
Click Insert
Click Line
Choose Scribble
Draw on the slide with your mouse or trackpad
Release to finish the drawing
Adjust the line color, thickness, or style if needed
Use the toolbar to move, resize, or delete the drawing
For more precise drawing, use a stylus or touchscreen device
To draw shapes, click Insert
Click Shape
Select a shape and place it on the slide
Edit the shape’s color, border, and size as needed