Good morning, 

I was wondering if there was a tool within MRICROGL that could be used to measure the distance between two locations on the loaded image (e.g. measuring the length of a lesion, the distance between two ROIs, scalp-cortex distance).   The ruler tool is a good start but it appears to just be fixed in one location (e.g. a scale rather than a tool for measuring).   If a dynamic option exists for measuring could you point me to it?   Otherwise, would you be open to adding this feature?    Thank you.

If you choose the Help/MouseGestures you will see a list of the modifier keys for your operating system. On my MacOS computer, I get a list that includes:

Option-Drag: Measuring tool 

The attached image shows an example. The title bar shows the start and end coordinates (XxYxZ in mm) and the distance between these two points: in this case 83.83mm