The control panels are divided into three sections.
First is a horizontal toolbar above the drawing area.
The most important tools and the main menu are located in this top toolbar, as well as in the format panel on the right.
Which tools are available depends on the context. For example, different tools are displayed when you are working with text compared to when you are working with objects.
Similarly, the format panel contents change depending on the context.
When you select an object, you can customize the display, the included text, or the arrangement and size in the format panel.
When nothing is selected, the drawing area itself may be customized.
The symbol library is displayed on the left hand side of the drawing area, and contains a variety of shapes organized into categories.
Simply click on a shape from the symbol library, or click and drag the shape into the diagram.
The shapes in the symbol library are categorized. You can expand or collapse these categories as needed.
You can select multiple shapes by holding the "Shift" key and selecting the shapes you want to use.
To delete all of the shapes you added from the symbol library. Hold the "Shift" key, select all of the shapes, then click on the trash icon in the toolbar.
Alternatively, instead of using the toolbar to delete the selected shapes, simply press the "Delete" or "Backspace" key.