Yeah, I should have come up with something for the recent "Open" Challenges.
I wanted to drop a note that may help with image viewing.
I have found Canon's bundled software (DPP or other photo programs pre_2010) pretty good.
However, I mainly rely on a free Windows program named IrfanView. (best to download it directly from links and mirror-servers on their site: irfanview.com). I've used it happily for ~15 years, Win Vista and Win 10 currently.
The reason I push it here is the ease of toggling between viewing full 100% (original size... scrolling if needed) and simply hitting "Enter" to view Full Screen and scaled-to-fit. Hit Enter again to return to 100% resolution in App window. I can also press "+" key or "-" key multiple times to zoom in or out.
Lots of other great features in Irfanview for photo tuning & tweaking: auto white balance adjust; intuitive & easy color tone and brightness adjust; and... Save_as (copy) with say a 85% Quality (slider setting) -- which might reduce image filesize from 4MB to 400KB (or for Forum uploads, simply set to Max 150kb file size).
BTW, I never rely solely on the Forum image handling if I want to seriously appreciate the work/art. The Browser (FF) and forum pages combo does not seem quite right in its presentation.
[my laptop display is 1600 x 1050, my desktop/external display is larger ~20 in. at 1680 x 1050) --- so I guess that helps too]