Here is a macro to be used with mom, that moves to a distance down from top or
up from bottom, depending on the sign of the argument:
.\" Goto position relative to top or bottom of page depending
.\" on sign of argument, respecting margins with parameter "m"
.\" Examples: .Goto -3c / .Goto 3c m
.MAC Goto END
. ie \\$1<0 \{\
. nr tmp \\n[#PAGE_LENGTH]+\\$1-\\n[#LEAD]
. if '\\$2'm' .nr tmp \\n[tmp]-\\n[#B_MARGIN]
. \}
. el \{\
. nr tmp \\$1
. if '\\$2'm' .nr tmp \\n[tmp]+\\n[#T_MARGIN]
\}
. vpt 0
. SP |\\n[tmp]u
. vpt
.END
Have fun,
ulrich
