how to activate focus peaking or magic zoom?

[arken21]

I went through couple videos on youtube about ML, I'm loving it with all the feature. I feel like it upgraded my T3/1100 to another level

anyway...I play around with settings, and now my focus peaking doesn't work anymore.

Can you guys please share the setting with functional focus peaking?
Thank you so much

[arken21]

and i'm wondering if there's a way to combine HDR photo internally instead just taking three different exposure photos

[Yuppa]

focus peaking doesn't work anymore

It does work. Rest ML settings, restart, turn on focus peaking, then make sure you are on the correct "live view" screen: try the "DISP" button (I don't own that body). Make sure A/F is on and toggle through them.  My advice: when "playing around" in the future, pay close attention.

combine...internally instead [of] taking three...photos

You MUST take three (or more) photos REGARDLESS. What you meant was, "Can I combine images (on a T3) in camera instead of having to use a computer?"

No.

Edit: The "make sure A/F is on" is due to the fact that you never explained what you meant by, "doesn't work."