Which setting is needed to see how Yap calls mgs.exe? I have included --trace=process and I can see when Yap calls mgs to check version:
 miktexlib: starting ""C:\texmf\miktex\bin\mgs.exe" --version"
When I come to page with a bitmap picture, I see:
 miktexlib: starting "C:\WINNT\system32\cmd.exe /c pngtopnm "D:\x/y.png" | ppmtobmp -windows > "C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\mik1D8E.tmp""
which is OK: yap is converting bitmap. But when I come to page with an EPS picture, nothing happens. Yap doesn't call mgs, and the picture is not displayed.
I use grpahicx, with dviwin option. Is that ok? Is there a better option for yap?