We just installed Magic Lantern 2.3 on out Canon 550D/T2i and wanted to test the Focus Peaking feature. When using this, the subject on which you focus highlights so you know it is in focus. Works handy as the LCD screen is not always clear to determine if the subject is in focus. This is one of the many featues of this piece of software, which can be downloaded for free from the MagicLantern site.
Edited in FCPX.
Cineplus Cinema Picture Style