Dynamic blocks are blocks with dynamic properties, and you can change the shape of dynamic blocks to suit the location where it's used. We have already seen a few dynamic blocks in action in the previous chapters, but here we'll insert a ready-made dynamic block to see how it works.

Type TP and press the Enter key. The tool palette will open. Select the Architectural tab from the list of tabs and drag and drop the Door – Imperial block in the drawing area. This block is a dynamic block that is available for use inside AutoCAD, and when you select the Door – Imperial block, you will get many grips, as shown in Figure 9.28:

You can click the grip on the top left of the door to change the open angle of the door. The arrow type grips in the middle of the Door block will flip the direction of the Door block in the horizontal and vertical directions. The arrow to the right will change the length of the door, and the arrow pointing down towards the bottom left of the door is for the wall thickness.

With a combination of all these geometry customization grips, the Door block here has become truly versatile. It can be used in many different locations in your drawing. In the next few examples, we will learn how to make these kinds of dynamic blocks with many different tools and options. So, let's get started with creating our first dynamic block.