I was asked a question form one of the participant, about the image's size in Manga Studio. I think it would be nice to share the answer, so post it here.
When you draw it with Manga Studio...
The drawing size(B4, A4, B5)/dpi (600/1200) is your choice.
You can adjust the pixel when you export the file, like the following images.
The following images are in Japanese, but the UI is the same (or similar) so you can get the idea.
Mind 出力範囲(R), chose the bottom one.
Depends on the original size, the horizontal width could be inexact size 1450 (1452, in this case), it's OK. Keep the vertical width 2050.