The first tool in this list, Quick, was added in the 2020 version of AutoCAD, and you can use it to measure dimensions quickly in a drawing. To use this tool, select it from the Measure flyout and move it in your drawing. As you move inside a room or closed area, it will show the length and width of the drawing area, as shown in the following figure:

These properties are not limited only to the length and width; when you move your cursor close to circular objects, it will show the radius of those objects and it will also show the angle of lines. In the 2021 version of AutoCAD, area calculation is also included with this Quick tool.

To find out the area of a closed space, just click and the area will show up on the tooltip. If you want to see the combined area of multiple regions, then click in a closed region, press and hold the Shift key, and click again in another closed area. The selected areas will be highlighted in green and you will see the combined area on the tooltip.

As mentioned earlier, the area feature of the Quick tool was added in the 2021 version of AutoCAD, so if you are working with the older version, you may not find this tool.