Lens For Canon Eos

Carol asks…How can i make the rule of thirds grid show up on my camera screen?I was wondering how I can make the rule of thirds grid show up on my camera screen, or if it is also possible to see it through my lens as well, I just learned about it yesterday and I want to learn how to use it first with it on my screen, how can i make it show up? I have a Canon EOS T2i .mr.eos answers:I did not know you could do that i thought it was more using your eyeballs... The rule of thirds is just

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