From OpenSCADAWiki
Suppose we need to add a graphic element to one of the existing libraries. To do this, select the library name, and click the button (
) on the toolbar. In the appeared window enter the Identifier and name of the new graphic element. After that, let's move on to this element and press the button (
). The drawing area will appear on the right. Using the double-click mouse over this field, or by using the context menu, we will enter the editing mode — the graphic editor mode, which allows you to perform all the provided manipulations with the figures. At that moment, when the graphic element we created is in focus, the tab "Attributes" will look like it is shown in Figure 5.3.a.