[GNC] How do I persuade gnucash or webkit to use us-letter and not a4 as default paper size ?

[dewaj]

Printing sets paper size to a4 by default .

My cheques are on us-letter .

I do not always remember to change the paper size when printing .

Which spell must be invoked to have it or them use us-letter by default
?

( mozilla firefox and derivatives do the same .)

Thank you ,

--
dj