Buildfont / UIBuilder - naming and placing the fonts where?

I have a new 4K monitor and want to start creating a 4K fiendly UI. I have installed the UIuilder and Buildfont.

I have no problem creating the bitmap and pace it in my ...UK/4K/Images/Fonts folder, but what appears to be the font file itself is named for instance FontArial25, FontArial30, FontArial35. I have added to the eq2ui_fonts.xml and have created the FontArial25.xml, FontArial30.xml and FontArial35.xml

When I use the BuildFont program - what are the the names you would use for the 3 bottom boxes in the dialog boxas there is no manual or instructions on this - what is the formaat for the boxes with ???? in ?

can't post an image, so basically - what are the correct terms

Font Name ? FontArial25 or FontArial25.TTF or other?

Output Options
FontArial25 .bmp - assume this is correct as it creates the BMP image
Style File ??????
Style Name ????

need help, so hopefully I can do a bit for all the other 4K users.

P.S - Do NOT even suggest DarqUI