I often find old elevation that were brought into a model at an early stage to have weird crop limits. While you can adjust them manually, it would be helpful, if Revit provided some assistance. The idea would be to allow a double click on the crop edge dot to move it where the model ends and then some. Just the same way Revit would have setup the elevation when the model would already have had the current extents. Right now there does not seem to be any double click functionality at all. Also this function would allow users to have the same crop heights for all elevations without needing to eyeball them. Yes, this can be done by scope boxes but those can only ever be eye-balled for now. Well, in everything but height.