How to increase memory history of Zbrush?

NAIMA

Hi I always find myself sometimes to use the undo undo undo button but many times its very limited and I can only go back to 4 stems or few more and forces me to reload the whole model previously saved , is there a way to increase the memory history for the action taken in the zbrush?

Money

I think it should be in Preferences tab>Mem> doc undo and tool undo.