It depends on what you are trying to do…are you planning on slicing the images? You can drag an additional line from the ruler itself to a specific point on your image both vertically and horizontally by simply clicking, holding and dragging the line to the point you want. These lines do not show up in a render.
Fran
"yehonatan" wrote in message
help,
I have photoshop and i need to use a multiuse of the measure tool on n image without losing the previews rules
if you know more software that can give this utility
thanks