settingtypes.txt

#    If set to false, only commands which can harm the map are added to the
#    journal.
we_undo.remember_innocuous (remember innocuous changes) bool true

#    This is the maximum amount of commands in the journal of a player.
#    The size of the journal is further limited by the memory setting.
we_undo.max_commands (maximum count of commands) int 256 1

#    This is the minimum amount of commands in the journal of a player.
#    The memory limit is ignored up to the last min_commands commands.
#    This is because being unable to undo a big mistake is worse than exceeding
#    the configured memory limit.
we_undo.min_commands (minimum count of commands) int 3 1

#    If the size of the journal exceeds this limit, old history is removed.
#    Specify the value in bytes, note that it only considers big data,
#    approximately.
#    default value: 2^25 (32 MiB)
we_undo.max_memory_usage (maximum memory usage) int 33554432 9