Add how to print in lximage.

source/2/2.3/2.3.1/lximage.rst

@@ -7,6 +7,8 @@ Useage
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 To use lximage use the arrow to the right to view the next file in the folder and the arrow to the left to view the previous folder. To open a new picture press the open button which looks like a blue folder with a piece of paper in it. To save the file as something press the button that looks like a floppy disk.
 
+If you wish to print a picture after viewing it from the file menu -> print or press control+ p to bring up a print dialog. 
+
 Version
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 Lubuntu ships with version 0.7.0 or lximage.