Changed docu to fit function

README.md

@@ -241,26 +241,31 @@ it to the InvenTree Label templates as usual. Add a command to the template's me
 ```
 
 In that case the printer driver ignores the picture rendered by WeasyPrint. Instead
-it loads the ZPL template, runs it through the Django rendering engine and send the
+it calls the render_to_string function of the template and send the
 result to the printer. The result can look like:
 
+![Label Example](https://github.com/SergeoLacruz/inventree-zebra-plugin/blob/master/pictures/example_label.png)
+
+This is the template to create the label:
+
 ```
 {% autoescape off %}
 ^FT30,25^A0N,18,22^FDIPN^FS
 ^FT150,30^FB100,1,,C,,^A0N,24,32^FDACME^FS
-^FT320,25^A0N,18,22^FD{{ object.pk }}^FS
-^FT100,70^FB200,2,,C,,^A0N,18,22^FD{{ object.part.name }}^FS
-^FT100,100^FB200,1,,C,,^A0N,18,22^FD{% for ma in object.part.manufacturer_parts.all %}{{ ma.manufacturer.name }}{% endfor %}^FS
-^FT30,150^FB340,1,,C,,^A0N,30,40^FD{{ object.part.IPN }}^FS
-^FT20,210^FB360,3,,L,,^A0N,18,22^FD{{ object.part.description }}^FS
-^FT15,110^BQ,2,3^FDQA,{{ object.part.IPN }}^FS
-^FT310,130^BQ,2,3^FDQA,{{ context.qr_data }}^FS
+^FT320,25^A0N,18,22^FD{{ item.pk }}^FS
+^FT100,70^FB200,2,,C,,^A0N,18,22^FD{{ part.name }}^FS
+^FT100,100^FB200,1,,C,,^A0N,18,22^FD{{ part.manufacturer_parts.first.manufacturer.name }}^FS
+^FT30,150^FB340,1,,C,,^A0N,30,40^FD{{ part.IPN }}^FS
+^FT20,210^FB360,3,,L,,^A0N,18,22^FD{{ part.description }}^FS
+^FT15,110^BQ,2,3^FDQA,{{ part.IPN }}^FS
+^FT310,130^BQ,2,3^FDQA,{{ qr_data }}^FS
 {% endautoescape %}
 ```
 
 Autoescape must be off in that case. We do not need &quot and similar escapes here.
-The context variables are object.xxx for the object to be printed and context.xxx for
-the printing context. Limitation: ZPL commands starting with backslash like \& cannot
-be used so far.
+Context variables can be used as usual.
+
+!!! warning "Linitation"
+    ZPL commands starting with backslash like \& cannot be used so far.
 
 Happy printing.