Venue map & booths
Number your booths
Select booths and renumber them in one click, left to right and top to bottom.
What you'll get: clear booth numbers, like A-1 to A-10.
Select the booths. Click Select all under a space type, drag a box across empty map, or Shift-click booths one by one.
On the right, under Renumber, type a prefix (like A-) and the first number.
Click Renumber.
You're done when each booth shows its new number.