New answers tagged multi-touch
Replaced my screen with a aftermarket few years ago. Started losing touch around the edges and keyboard response slowed down. Progressively got worse.Installed new aftermarket screen of which have come down in price greatly. Seems like they somehow wear out as fixed the problem. Don't know if this can happen with factory screen but fixed my situation.
Finally, I find this by myself, and it turn out to be so easy. According to this, I find that it's right in the first picture I post in the question and it's in the top of all and default to force touch but can change to three finger tap.
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