Could it be made possible to select more than a single layer to work on. The obvious situation is that a figure is animated on say 2 layers, for ease of drawing.
Then when the figure is moved across the screen it, both layers can be selected and move in a single operation.
There is of course in the immediate time a work around. This involves drawing a rectangle around the drawing and then copying this to the second layer
If the linevis thin, say a line width of 1 unit, you could move 1 layer as required and then when the animator is happy with this, they could use the rectangle to line up the other(s) layers.
Another work around is to draw the drawings on several layers and then combine them before moving the character across the screen.
Both of these work, but it would he much easier if you could select multiple layers.