INFOSEEK: Word selection issues

[deathpixie]

Alvin's done it again. For some reason, in Word, whenever he tries to point and click on a part of a document, he winds up selecting entire paragraphs instead of moving the cursor. I can't work out what he's done - obviously he's hit something on the keyboard by accident to turn this on and I can't find out what it was - and I'm not going to retype every email he does. Help?

Edit: I swear to god I'm going to smash that computer of his - Sonia went in to look at it and it's fine now. Arghgkanweoiashdnflwh.