Last updated on January 19 2023
The Ruler performs a linear measurement of the distance between two points in millimeters (for calibrated images).
After picking the option on the toolbar a default line will show up over the image with the corresponding caption representing the line distance, in millimeters. You can reposition and resize this line by clicking the handles on each extremity of the line with the left mouse button and dragging the mouse to the most appropriate position.
Also, you can move the entire ruler by clicking over it and dragging the mouse. The ruler will follow this movement.
This applies to both 2D and 3D environments.
