[Pharo-dev] Easy way to change "move between words" to alt key in OSX?

Hi guys, It happens to me that I got so used to work in Pharo and "move between words" with ctrl key, that then, whenever I use any other program of OSX, I get crazy because in many programs ctrl+arrow is for going start/end of file. Same for command. It seems to me that using alt + arrow for moving between words is the most common in OSX. So....is there a way to set this via preferences or something? Thanks in advance, -- Mariano http://marianopeck.wordpress.com