Is there a photo viewing app that I can pin ontop of other apps as a reference as I work in sketchbook?

They did. But color film was more expensive. Also B&W was easier and cheaper to develop.

Even when people developed their own film, B&W was much simpler and easier for them to develop at home. It wasn't worth the cost to develop B&W at home. Also, it too a very long time to develop it, or at least to get it back from a developer.

And then earlier in the century, the ability to have color in film had not been developed yet. Even now, many photographers use B&W for dramatic effects.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.