About the Pen tool and shape tools
The Pen and shape tools create graphics within an SVG element. SVG is an XML-based image format used for vector graphics. Google Web Designer creates the XML in the background when you use these tools to create images.
canvastag for shapes. Newer versions of Web Designer automatically convert
canvasshapes to SVG. Converted ovals with an inner radius may appear differently after conversion and need adjustment.
To choose the Pen tool, Oval tool, Rectangle tool, or Line tool, click and hold the Pen tool in the toolbar. A pop-up menu appears so you can select the shape you want to add. The most recently selected tool is shown in the toolbar.