I would like to see sizing option on layers for viewports. This means, if I have a mix with 3 different viewports (3 different screens), I would have options on the layer to snap the geometry to each viewport. This would save the time of creating presets for each of these positions. It might be that you would have to setup screens somewhere (in the case of blended screens, or screens that take up two outputs). In a current bid I am working on, this is helping D3 edge out, because it is a simple setting to change mapping content from one screen to the entire canvas.