Aha! Whiteboards | Copy or paste style
After you have formatted an object, you may want the other objects on your whiteboard to have the same style. You can copy an object's style and apply it to other objects in a few clicks so you do not have to format them individually.
Right-click an object and click Copy style.
Then Shift+click to select the objects you want to have the same style, right-click, and select Paste style.