MacBook Pro touchpad doe not shake the cursor
Sierra has a nifty feature if you shake the mouse or shake your finger on touch pad it will enlarge the cursor momentarily....making it much easier to find the cursor if you don't see it right away. This works on my older iMac with bluetooth TouchPad and bluetooth Mouse. On the MacBook Pro, I have some difficulties. Initially (on login screen) bluetooth Mouse doesn't appear to work, however it does, once logged in, and shaking it enlarges the cursor. On the internal TouchPad, shaking finger does not enlarge the cursor, also dragging doesn't work half the time (haven't figured out the trick nor can I find documentation on dragging for that internal TouchPad). I already checked the only Shaking box I could find, in Mouse preferences. There doesn't appear to be a separate one for TouchPad that I can find (either in Accessibility or TouchPad preferences). So, what am I missing? How can I make the TouchPad shake the cursor?
MacBook Pro TouchBar and Touch ID, macOS Sierra (10.12.5)