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Description of problem:
I'm trying to set the printable area/margins for my printer, which is
a Samsung ML-4500 though I think the same applies for any printer.
There is clearly a facility to tweak some imageable area and margins
values in the "Queue Options" part of system-config-printer but I
can't find any documentation or hints as to which values to tweak, how
to tweak them, what the difference is between the "imageable area"
options and the "margins" options etc.

I the past I have successfully used the alignmargins/align.ps scripts
from linuxprinting.org to tweak the PPD file to match my printer.
However, given that system-config-printer clearly intends to provide
the same sort of functionality, I would really like to do it "the
approved way", which might then create settings that would persist
across upgrades etc. 

I would really appreciate it if a quick "margins howto" file was added
to the documentation section and/or help section of
system-config-printer. I've tried changing some values and looking for
the differences in the output to try to decide what's what but I can't
make sense of it at the moment and I'll be wasting a lot of paper.

In the meantime I'm going to work around it by using the old
alignmargins method and manually assigning the modified PPD file to
the queue with lpadmin.


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Edit a printer queue.
2. Select "queue options"
3. Boggle.
    

Actual Results:  Top and left few pixels missing from printout.

Expected Results:  Should have found guidance on setting margins.

Additional info: