--- pt.tmac.orig	2024-03-07 21:17:06.892101376 +0000
+++ pt.tmac	2024-03-07 21:08:27.323216733 +0000
@@ -2,7 +2,7 @@
 .\"
 .\" The main macros are as follows:
 .\"
-.\" .ptbeg x_min x_max y_min y_max
+.\" .ptbeg x_min x_max y_min y_max [x] [y]
 .\"   Begins a figure.
 .\"
 .\" .ptend
@@ -50,6 +50,9 @@
 .	nr ptht \\n[ptywid]*\\n[ptwd]/\\n[ptxwid]
 .	nr ptxoff \\n(.i
 .	nr ptyoff \\n(.d+\\n[ptht]
+.	if \\n(.$>4 \{\
+.	nr ptxoff 0\\$5
+.	nr ptyoff 0\\$6 \}
 .	ne \\n[ptht]u
 .	ev ptenv
 .	nf