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Parameters (constants) to control the appearance of the footer
The name of the constant, and the accepted values.
l1 (left column, row 1)
l2 (left column, row 2)
l3 (left column, row 3)
l4 (left column, row 4)
r1 (right column, row 1)
bic, iban, vat, bankgiro, custom (any string)
r2 (right column, row 2)
bic, iban, vat, bankgiro, custom (any string)
r3 (right column, row 3)
bic, iban, vat, bankgiro, custom (any string)
r4 (right column, row 4)
bic, iban, vat, bankgiro, custom (any string)
Options for the rows and columns
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