imdistline converting pixel measurement

Hello, I am using imdistline to measure temporarily how many pixels between two points as shown in the photo bellow. each pixel measure is 0.1 of a millimeter. is there a way to stick the measurement as a label ,on the plot after the number of pixels was multiplied by 0.1?

Thanks

[Rik]

You could use a text box (or annotation) to add it after the multiplication.

[fima v]

how can i permanently label this?

[Rik]

How permanent do you need it to be? You could print the content of the figure to an image file.