Just a thought:
I don't use the image viewer of Tropy. Instead I use one of the generic programs from Windows to view the image and then add the info I read into the various items in Tropy. I do this because the zoom-function is very blunt in Tropy. For example, double clicking an image zooms in A LOT, and as far as I can tell, you can't use your mouse wheel to zoom in our out which means you have to use the gauge above the image, which I simplyu don't like out of arbitrary reasons that I can't really argue. Well, yes, it's a hazzle to have to move your mouse cursor up and down each time you want to zoom out and in. Lastly, I just think it's easier to work with two windows at the same time because that's the setup I have in my office. I realize that a lot of people who don't work with Tropy don't have two screens, but it could at least be an option.
If I for some reason have missed that these features exist, that's my bad. But if they don't exist (mouse scrolling for zooming in and out; separate window for image viewer), please consider them.