If I save a file as a MS Word file, Hancom preserves the font type and size.
I recently converted a windows font to *.qpf using Meanie's instructions.
It is "Arial bold"
Whenever I find something that I want to read in Hancom, I just change to this font at 18pt.
Here is a screenshot of a file I saved in 18pt. Arialbd.
This file always opens with this font and font size selected.