View: Do you work in a higher res & shrink the page down? Though you're unsatisfied, I'd bet many folks (myself included) would love to see larger versions of your comics; maybe 1500 x 2000 px?
Currently, I run at a screen resolution of 1920 x 1200, and the page fits fully on my screen, with about a quarter inch free space at the top and bottom ... so the current page size is just about perfect for me.
Here's a tip. There's an online program called waifu2x (lousy name, great software) that can upscale images (up to 1500 px maximum dimension) without generating unwanted artefacts. I've used it frequently and the results can be surprisingly good. You can select "Artwork" or "Photo", 1.6x or 2x, and several Noise Reduction settings. All you have to do is select Browse and choose the file you want (or drag and drop it over the Browse button), select the settings and click Convert. The upscaled image appears in a new tab. (NB if you're using Firefox you have to use Ctrl+S to download the image.)