Make a continued measure on a part of a polygon or polyline:

1. Select in an image the segments of annotations and regions of interest that you want to measure. Multiple segments and contiguous segments can be selected by clicking on the left mouse button while holding the 'Shift' key. You can unselect segments by clicking on it while holding the 'Ctrl' key.
2. Click on the "2D Actions" button of the 2D Viewer window. A menu will appear under your mouse cursor.
3. Click on "Measure".
4. The measurements have been created.

You can also make a measurement by 2 others methods: by the top menu of the 2D viewer window, or by the context menu.
See "How to launch actions".

Make continued measurements intersected by one or several lines:

1. Select the "Line" tool in the list of annotations and ROIs. (see "how to create 2D annotations")






2. Make one or several lines. (See "How to create or modify a line")
3. Select the "Measure" tool in the list of annotations and ROIs.






4. Click the left button to define the first point of the measure.
5. Drag your mouse to the other side of the line(s) to define the last point of the measurements.
6. Click on the 'Space' key of the keyboard to get several continued measurements. (Click again to change from several measurements to one).
7. You can drag again your mouse to optimize the position of the last point of the measurements.
8. Click on the left button.




The unit of the measurement will be the millimeter if the image contains information about pixel spacing. Otherwise the unit will be the pixel.

To modify these previous measures: see "How to create a measure?"