You can change the price zone for the seats of your choice on an event's floorplan.
The steps you need to follow are:
Click on the "Administration" tab
Select "edit" under the "plays" section.
From the events list on your right, select the play you want to edit.
Click on the "existing events" tab.
Select the desired event (or all the events in the same venue and with the same pricelist) and click on "change prices on seating plan".
On the pop-up, you see the seats with the color of their preset pricezone and on your right you can see the available zones of your event's pricelist.
Select the seats you want to change their price (they turn yellow) and then select the new pricezone from the dropdown menu.
Click on ''match'' and ''save''.
On the next pop-up, you can preview the seats update: the number of seats that have been already sold (so their zone will not change) and the final number of the seats whose price will change. Check your options again and click "save".
The price change for the selected seats is completed.