The tool palette is another great source of AutoCAD blocks. Tool palettes not only have simple blocks, but also a special kind of block called dynamic blocks. These dynamic blocks can change shape as per the settings specified in them. Tool palettes also contain blocks containing attributes. In this section, we will learn about using tool palettes to insert the blocks that we need, and we will also learn how to create our own tool palette and then save our custom blocks on these palettes. So, let's begin by exploring the tool palettes.