I write letters using dinbrief.sty. Now I discovered that when I produce postscript files of my letters to send them as faxes it makes a difference if dvips is configured using a4 or A4 as format. Using A4 hylafax supresses the header of the letter. Using a4 the fax looks same as viewing it with ghostview. I usually don't fax control faxes to myself so this missbehavior is hard to discover. I looked at the differences in the postscript files and found they are the same as in /usr/local/teTeX/share/texmf/dvips/config/config.ps. This is the sequence a4 that works .. .. .. %EndDVIPSBitmapFont end %%EndProlog %%BeginSetup %%Feature: *Resolution 600dpi TeXDict begin %%BeginPaperSize: a4 a4 %%EndPaperSize %%EndSetup %%Page: 1 1 .. Here follows postscript code containing the header text of my letter. This is the sequence using A4 that makes the header of the letter disapear if faxed with hylafax but not if viewed with ghostview or printed by the postscript interpreter of my laserjet. .. %EndDVIPSBitmapFont end %%EndProlog %%BeginSetup %%Feature: *Resolution 600dpi TeXDict begin %%PaperSize: A4 %%EndSetup %%Page: 1 1 .. Here follows postscript code containing the header text of my letter. What these two versions a4/A4 are good for and are there any other differences to be aware of ? Is both 'valid' postscript or is hylafax too intolerant in interpreting the code ? -- Klaus Dittrich e-mail: [EMAIL PROTECTED]