Technically, yes, but you will need to go through a similar process as you went through to move to vertical receipts in the first place, including scheduling an after-hours conversion with someone available at every branch to perform testing.  Remember that all of your printers must use the same receipt format, so if you decide to switch back, ALL of your receipts at every branch will go back to the old format.

NOTE: A date has not yet been determined, but it is likely that at some point down the road we will sunset support for the old horizontal receipt format.