On Multiview, when cropping is enabled, add an option such that panning, tilting and zooming take place within the crop rectangle (x1, x2, y1, y2). This could be implemented as a checkbox labeled "Lock" right under the Cropping box. Presently without this feature, repositioning a layer (by panning, tilting and/or zooming) requires compensating adjustments to x1, x2, y1 and y2 to keep the layer in the same place as it was prior to repositioning. It's a total pain. With the feature enabled, panning, tilting and zooming can freely take place without ever having to re-adjust x1, x2, y1 and y2. It would be a real time saver.