SHAPES – Clicking on this icon will show a selection box for you to choose from the following: Rectangle or Rounded Rectangle
Upon clicking the Shapes icon:
Once you make a selection, the shape will appear on the ad and you can edit the border, color, as well as action in the section to the right of the Builder:
* New: Color Picker - once you click in the Border Color or Fill Color box - you can select a color, type in the hex number, or click in the white rectangle/bottom left to bring up the color picker:
Select the color picker icon and place it over any area in the builder of the color you wish to select. The info and object selected will change to the color of what you have selected to match.