First enter your printer device in the string gadget.
If you have an USB printer, or a kernel with bidirectional printing,
use the 'read-status' button. 

Aligning the cartridges
=======================
Print the alignment page. 
Tweak the alignments so that they all best match a straight line. Send
the parameters to the printer. 


Cleaning the printer nozzles
============================
This should be pretty obvious.


Changing cartridges
===================
Choose the right cartridge types. Select which cartridges you replaced.
Send the parameters to the printer. 

