Currently when you use the 'Measure tool' you 'left click' and drag, which gives you the angle and point to point values and when you 'click' again it switches to give you height, or width values that you can drag out away as needed and set with 'left click', or if you 'right click' instead you get the point to point value, which can be hard to read if over other things in the scene, and can't be dragged out. It would be nice if on the second 'click' you could use 'Tab' to cycle through point to point and angle values as well, and have all options be draggable and set with left click. Additionally if when the angle option is selected you could 'Shift' select an additional line to measure between the two. This may need my previous post on 'Selectable lines/curves that are joined' in order to work.