I don't know when this functionality stopped working. Some time after Version 4? This used to be possible in WaveForm but does not work now: Delta X and delta Y trace data can be seen on-screen using a Left-Click and Drag select box, with the readout adapting to the Y axes in each pane. Returning the cursor to within a small radius of the starting point of the select box - without releasing the Left-Click - returns the readout to X and Y trace data." Left-click and drag still draws the bounding box but there is no Delta X and Delat Y data shown. Dragging and releasing the Left-Click zooms as usual.