Re: where is the windows manager icon.
OK So any video either through the stock or any video app, or you tube - or by touching a video link can cause this. I am not familiar with that pop up, it may be Verizon specific.
There is a Complete Action Using pop up especially with You Tube links , but you will have seen that before.
If you can post a screenshot someone may recognise it, but if it's one of those small pesky short pop-ups they can be impossible to capture. If it's specific to one video app that would help.
If no luck here I'm sure someone on the Samsung Note 3 Verizon sub forum will have come across it.
From my SM-N9005 Note 3 on Tapatalk