touch pad-sometimes works,sometimes not..
I rely on touch for my key pad.
Sometimes it works, and sometimes not.
Sometimes it pops up a yellow line when I click it.
Sometimes it does nothing when I click it. Then I have to sign out of the page, and start over.
What am i doing wrong
MacBook Pro (15-inch Early 2011), OS X Yosemite (10.10.5)