rows
menu entry has been renamed to size
. The value of size
functions the same as rows
(1-6).row
and column
entries for items has been replaced with the pos
entry with two acceptable formats:row,column
format, such as 3,0
for row 3, column 0 (the first row/column is always 0)slot
format, which is a single number for the slot number from 0 up to 53 (starting at the top left slot increase left to right then top to bottom)material
field is just for the material name and not for any item meta (glow, potion_data, nbt, etc).