.\" Load this before a macro package that you want to trace.
.rn de !!de
.!!de de
.!!de \\$1
.tm *** trace enter \\$1: \\\\$0 \\\\$@
\\\\*[!!\\$1]\\\\
.tm *** trace exit \\$1: \\\\$0 \\\\$@
\\..
.!!de !!\\$1 \\$2
..