If the Measurement window is not open, press M to open it.
Click on the Line sequence button. Then click-and-drag the first point in the photo. Drag it to where you want to start measuring from.
Then release and click-and-drag the next point. That is all there is to it!
The sum of the lines are displayed in the measurement window.
You can move and correct any part of the lines.

This measurement simply gives you the length of several line pieces. If you want, VisiQuick can add a subtotal, for instance, at the point where an endo file is ending. Click here for instructions.