Add a shape to your scene:
Open your video project in Synthesia.
Click the Shape icon in the top menu bar.
Select the shape you want to use (e.g., rectangle, circle).
Drag the shape to position and resize it within your scene.
Change the color of a shape:
Click the shape on your canvas to select it.
In the right-hand menu, click Fill.
Choose a new color for the shape.
(Optional) Select the Gradient option to apply a two-tone effect.
Notes:
Use the Change all button in the Fill section to apply the new color to all shapes with the same original color.
See the Synthesia shapes documentation to learn more about Synthesia Shapes.
To learn more, check out the Synthesia Academy Feature Fridays: Shapes recording.