Hi,
ML work perfectly in my 550D, but when i activate crop mark i have only CINESCO2, are you now this problem ?
PS: sorry for my bad english
Pressing Set on the cropmarks menu item allows you to quickly turn the feature on or off, which is why it's switching between Cinescope (which is the cropmark you have selected) and off. You need to enter the sub-menu by pressing the Q button while the cropmarks menu item is highlighted. A sub-menu opens which shows more options related to cropmarks, including selecting the cropmark you need.