You can create interesting effects by making objects more or less opaque. When you put a low-opacity object on top of another object, for example, the bottom object shows through.
Select an image, shape, text box, line, arrow, or video, then click the Style tab at the top of the sidebar on the right.
If you don’t see a sidebar, or the sidebar doesn’t have a Style tab, click
in the toolbar.
Drag the Opacity slider.