diff --git a/CHANGES b/CHANGES
index 1189b04..1201879 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,13 @@
+* v1.2 Updated help text of stl_boolean. Added more commands.
+    * stl_area
+    * stl_ascii
+    * stl_bcylinder
+    * stl_binary
+    * stl_cylinders
+    * stl_decimate
+    * stl_flat
+    * stl_volume
+    * stl_zero
 * v1.1 Fixed Makefile to properly install stl_boolean
 * v1.0 release with the following commands
     * stl_empty
diff --git a/Makefile b/Makefile
index b32e6ab..9dfd51d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 prefix?=/usr/local
 target=$(DESTDIR)$(prefix)
 
-VERSION=1.1
+VERSION=1.2
 DOCS_DIR := man
 BIN_DIR := bin
 CMDS := $(addprefix $(BIN_DIR)/,stl_header stl_merge stl_transform stl_count stl_bbox stl_cube stl_sphere stl_cylinder stl_cylinders stl_cone stl_torus stl_empty stl_threads stl_normals stl_convex stl_borders stl_spreadsheet stl_area stl_volume stl_bcylinder stl_binary stl_ascii stl_zero)
diff --git a/src/stl_cylinders.cpp b/src/stl_cylinders.cpp
index 209ec91..282d386 100644
--- a/src/stl_cylinders.cpp
+++ b/src/stl_cylinders.cpp
@@ -30,10 +30,14 @@ Copyright 2020 by Allwine Designs (stl_cmd@allwinedesigns.com)
 #define BUFFER_SIZE 4096
 
 void print_usage() {
-    fprintf(stderr, "stl_cylinders outputs an STL file of a single cylinder.\n\n");
+    fprintf(stderr, "stl_cylinders outputs an STL file with multiple cylinders defined by a custom binary input file.\n\n");
     fprintf(stderr, "usage: stl_cylinders [ -r <radius> ] [ -s <segments> ] <input file> <output file>\n");
-    fprintf(stderr, "    Outputs an stl file of a cylinder with the provided radius, height and number of segments to approximate a circle.\n");
-    fprintf(stderr, "    If the radius or height are omitted, they default to 1. If segments is omitted, it defaults to 32. If no output file is provided, data is sent to stdout. \n");
+    fprintf(stderr, "    Outputs an stl file made up of N cylinders defined by start and end points in the input file each with the specified\n");
+    fprintf(stderr, "    radius and number of segments provided on the command line. The first 4 bytes of the input file represent how many \n");
+    fprintf(stderr, "    cylinders to generate, N. The rest of the input file defines start and end points that define a line segment of the\n");
+    fprintf(stderr, "    the central axis of the cylinder. Each segment is defined by 6, 4 byte floats. The first three are the X,Y,Z values\n");
+    fprintf(stderr, "    of the start point and the second three are the X,Y,Z values of the end point.\n");
+    fprintf(stderr, "    If the radius is omitted, it defaults to 1. If segments is omitted, it defaults to 32.\n");
 }
 
 void write_cylinder(FILE *outf, const vec &pt1, const vec &pt2, float radius, int segments) {
diff --git a/src/stl_zero.cpp b/src/stl_zero.cpp
index 7b47a07..ebec22d 100644
--- a/src/stl_zero.cpp
+++ b/src/stl_zero.cpp
@@ -32,7 +32,7 @@ Copyright 2014 by Freakin' Sweet Apps, LLC (stl_cmd@freakinsweetapps.com)
 void print_usage() {
     fprintf(stderr, "stl_zero centres an STL file.\n\n");
     fprintf(stderr, "usage: stl_zero [-base] [<input file> [<output file>] ]\n");
-    fprintf(stderr, "    Centre an STL file around the origin. ");
+    fprintf(stderr, "    Center an STL file around the origin. ");
     fprintf(stderr, "    If no input file is provided, data is read from stdin. If no output file is provided, data is sent to stdout. \n");
     fprintf(stderr, "        -base - If this is specified, set the lowest point in the design to z = 0. \n");
 }