OK so I tweaked my start screen on Computer A (including adding some apps from the app store), and now I want that layout and those apps to appear on Computer B. (note that my setups are NOT identical as I have much more software installed on Computer A)

On Computer A, I went to PC Settings, OneDrive-->Sync Settings and enabled sync for my apps as well as for the Start Screen. I restarted Computer B to see if that particular app I downloaded from the Windows Store would be there but nope, it isnt. Also had made changes to the weather app on Computer A and those have not transferred over either.

What have I missed? Do I need to reboot Computer A? Or is there a sync now button somewhere? And how does Windows know WHICH of the 2 computers should be considered the Source and the other the Destination?