Just click three points start point, end point, and height point 

Don't work.

:) Works, thank you. Sorry, I didn’t know that the tool only works with silk-layers.

@M-16, Best to use it on the **Document** layer only.

Ok. Thank you.

Hi What does the measurement tool automatically switch off the measure value when you final click it?  I get the measurement but when i slide to where i want to see it, it turns off and disappears. Is there a setting to make this remain?

@bijanmohandes , The **Dimension** tool (Hotkey **N**) works as described by UserSupport above: Just click three points start point, end point, and height point  The **Measure** (Hotkey **M**) tool is not persistent. It measures the distance between the first and the second mouse clicks. A third mouse click or ESC resets it.

I dont think this is right....  You can see from the above that I can make multiple 'persistent' measurements and leave them on the page. This works on one of my tabs. On the other tab, the dimension measured disappears once you make the third click. There must be a setting that controls if it says or not, buri cant see it.....

What you are showing is the persistent **Dimension** (N) tool not the non-persistent **Measurement** (M) tool. I cannot reproduce the **Dimension** (N) tool working in one PCB tab and not working another PCB tab. Both tools also operate as described in the Footprint Editor.

I'm also having problems with the dimensioning tool. In one file it works fine. In another file (Larger design than the first) the tool doesn't want to provide a vertical measurement (will only expand horizontally), once the dimension is set a third click doesn't complete the height of the dimension, you have to press return to complete and you can't set the height of the dimension. Is this a known issue? I'm running V6.5.22 at the moment