open the camera directly with a browser, change between main steam and sub-stream.. note difference in quality, the lower resolution stream is used for grid displays (more than one 1080p stream is going to be shrunk, it helps with load when you have a bunch of cameras displaying at once) and for mobile/remote clients, you'll never get 4MP cameras streaming over a mobile network, but you can get a low resolution substream to display well if configured correctly..
typically you record the mainstream and view the substream, unless your specifically displaying the main stream at full glory.
they have separate quality settings, the main steam will look great but you can detune the substream so it looks like junk.. so determine which stream your viewing and then make sure your adjusting the settings for that stream or you wont see any changes.