shows how many generations the pattern advanced
shows the number of undo states, that is how many patterns are saved on the undo stack
the number of redo states, that is how many patterns are saved on the redo stack
p is showed when pan mode is on.
d is showed when the drop selection before running option is checked.
t is showed when the table tool shows the next generation.
x is showed when xor mode is on.
show what state is selected
shows what tool is selected
shows the size of the board
show how many cells there are in the current pattern