[NTG-context] Feature Request: showframe debugging

Hi, \showframe [ labels=on, measurements=on, color=red, ] Would produce an image similar to the attached, but with the black lines drawn in the specified colour. Using labels=on would show the names of the items that can be changed with \setuplayout. Using measurements=on would show the values for each of the items. I don't know if there is any value separating the measurements from the labels. Thank you!