I got it now. I followed the link you provided and it seems the previous android version had different taskbar icons, which I found a bit easier to understand.

I got it now. I followed the link you provided and it seems the previous android version had different taskbar icons, which I found a bit easier to understand. Still, Android and iOS do not help much with discoverability in my opinion, and the newest the version, the worst it is. What's next, heptagon for sending email and decagon for contacts ? I feel so old :(