--- vttest-20190710/main.c	2018-11-16 19:05:02.000000000 -0600
+++ vttest-20190807/main.c	2019-08-07 16:02:08.934327524 -0500
@@ -63,7 +63,7 @@
 usage(void)
 {
   fprintf(stderr,
-          "Usage: vttest [-V] [-l] [-p] [-s] [-8] [-f font] [24x80.132]\n");
+          "Usage: vttest [-V] [-e] [-l] [-p] [-s] [-8] [-f font] [24x80.132]\n");
   exit(EXIT_FAILURE);
 }
 
@@ -130,6 +130,15 @@
         case '8':
           output_8bits = TRUE;
           break;
+        case 'e':
+          {
+            char *enval;
+            enval = getenv("COLUMNS");
+            if(enval != NULL) max_cols = atol(enval);
+            enval = getenv("LINES");
+            if(enval != NULL) max_lines = atol(enval);
+            break;
+          }
         default:
           usage();
         }
--- vttest-20190710/vttest.1	2018-09-11 19:56:52.000000000 -0500
+++ vttest-20190807/vttest.1	2019-08-07 15:54:08.248738841 -0500
@@ -68,6 +68,9 @@
 .TP 5
 .B \-8
 use 8-bit controls (this can be changed with a menu option).
+.TP 5
+.B \-e
+read LINES and COLUMNS from environment to specify terminal geometry.
 .
 .SH AUTHOR
 Per Lindberg