OpenOffice autocorrect.

OpenOffice has the habit of "correcting" what I type, but sometimes it gets in my way. For example, in "Calc" I am tiping a sentence with a particular capitalization, and as soon as I press "Enter" it changes it to "his" liking. How do I undo that? I can't help but compare with excel, where just using "undo" will undo the last correction, an leave what I typed. I think in OpenOffice the autocorrection can be disabled completely, but that is not what I want, I want it to just undo the correction. -- Cheers, Carlos Robinson