Hello

For some reason I'm having a lot of trouble getting the page to include precisely 40 lines of text (10.5 Baskerville with an interline depth of 12 points).  On an experimental file with 6 full-depth pages and no footnotes, I find that the first three have 39 lines and the second three have the desired 40 lines.  You will see from the code below that I have been tinkering a lot, but it ought to be a simple matter!  Can someone let me know what I should be doing?

Here's the code (and I have to desert my desk now till this afternoon so am not in a hurry for an answer!):

\definepapersize[OUPoctavo][width=136mm, height=214mm]%should be 216!

\setuppapersize[OUPoctavo][A4] % paper size, printed on A4

\definelayout[GHIL]

      [edge=48pt,

      edgedistance=6pt,

      margin=72pt,

      margindistance=6pt,

      topspace=48pt,

      header=12pt,

      headerdistance=3pt,

      textheight=480pt,%should be 480pt,

      height=522.6275pt,

      width=24pc,

      footerdistance=6pt,

      footer=12pt,

%     lines=40%this messes up position on the A4 page

      location=middle,

      marking=on,

      horoffset=0pt,

      veroffset=0pt,

      paper=OUPoctavo]

\setuplayout[GHIL]