Issue Description
Currently, when saving views from the 3D window it will use the screen resolution of the monitor to determine the DPI on the Layout. The maximum size of the image is limited by the maximum size of the monitor. To get a higher resolution image you would need to use the PhotoRendering palette to define an output with higher resolution.
We do have multiple requests to have the ability save a view from the 3D workspace window at a higher resolution and may find its way into our product roadmap for a future release of Archicad.