Dimension Line is a quick way to understand how long or wide the element or area is, check the accuracy of measurements, adjust the scale, etc.
Shortcut → D
To draw a dimension line, click on the relevant starting point. Then select the necessary endpoint by clicking on it in order to finish the dimension line.
You’re also able to save all created dimension lines and sticky notes when exporting marked-up drawings into PDF format. To do this, tick stickers and/or dimension lines in settings and press “Export PDF”.