diff --git a/gnuplot/README.md b/gnuplot/README.md
index dd38b1c..d64accd 100644
--- a/gnuplot/README.md
+++ b/gnuplot/README.md
@@ -3,6 +3,12 @@
 
 
 
+    usage:
+      gnuplot line.gp                       run line.gp script
+      gnuplot -p line.gp                    run script and kepp figure open
+      gnuplot -e "file='data.dat'; column1=1; column2=2; format=''; out=''" line.gp
+                                            run script with altered variables
+
 [line.gp](./line.gp)
 
 ![img](./line.png)
diff --git a/gnuplot/README.org b/gnuplot/README.org
index c93d658..2223ef0 100644
--- a/gnuplot/README.org
+++ b/gnuplot/README.org
@@ -1,4 +1,12 @@
 
+#+begin_src sh
+  usage:
+    gnuplot line.gp                       run line.gp script
+    gnuplot -p line.gp                    run script and kepp figure open
+    gnuplot -e "file='data.dat'; column1=1; column2=2; format=''; out=''" line.gp
+                                          run script with altered variables
+#+end_src
+
 [[file:./line.gp][line.gp]]
 
 file:./line.png
diff --git a/gnuplot/line.gp b/gnuplot/line.gp
index d14a7c5..ad3ec47 100755
--- a/gnuplot/line.gp
+++ b/gnuplot/line.gp
@@ -9,7 +9,7 @@ if(!exists("column1")) column1 = 1
 if(!exists("column2")) column2 = 2
 if(!exists("format")) format = 'terminal'
 if(exist('format') && format eq 'terminal') set terminal dumb; set tics scale 0
-if(exist('format') && format eq 'png') set terminal png transparent
+if(exist('format') && format eq 'png') set terminal png transparent enhanced
 if(exist('format') && format ne '') set terminal format
 if(exists("out")) set output out