RE: [Groff] How to set the exact top and bottom margin with -mm

[Ted Harding]

On 30-Sep-00 Thomas Baruchel wrote:
> Brest, le samedi 30 septembre
> 
> Hi, I just discovered the -mm macros after having always written raw
> troff code (sometimes I used -ms macros :-). Is it possible to set the
> exact value for the top and bottom space ?

The traditional mm macro is

.VM m n

which m lines to the top margin and n lines to the bottom margin.
Reading tmac.m (which, by the way, is internally quite well documented),
the groff implementation is

  .\" set top and bottom margins 
  .de VM
  .if \\n[.$]=0 \{\
  .       nr pg*extra-footer-size 0
  .       nr pg*extra-header-size 0
  .\}
  .if \\n[.$]>0 .nr pg*extra-header-size (v;\\$1)
  .if \\n[.$]>1 .nr pg*extra-footer-size (v;\\$2)
  .if \\n[D]>2 \{\
  .       tm extra top \\n[pg*extra-footer-size]
  .       tm extra bottom \\n[pg*extra-header-size]
  .\}
  address@hidden
  ..

which clearly does the same thing (note the "v" units in (v;\\$1) etc).

You could try re-writing this (changing (v;\\$1) to (p;\\$1) perhaps)
or you may get a better idea after reading the macro file.

Hope this helps.
Ted.

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Date: 30-Sep-00                                       Time: 16:58:23
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