Left window shows present data, the right one yesterday's data. You may find a lot of other examples when one has to check two sets of numbers or weather maps. If you use one Opera profile it should be easy to create two sync switches on/off for horiz and vert synchronization sliders for windows in Settings (easy to reach) or (better) using "Easy setup".

For more tile options one may turn to operating systems. E.g. Windows 10 can organize windows opened in its Desktops using tile option. You can open a lot of window apps and arrange them to your likes. What Opera lacks are only the three unresolved (yet!) issues I described.

Implementing the three options I described in three posts titled Workspaces - xxx you'll receive conditions to use Opera browser as if having tiles and without turning to coding, e.g such solution offered by Vivaldi team.

I like to search for the easiest ways to make Opera more functional than clamoring Opera Team for new options to implement them in application itself. Excellent example of such attitude to Opera is the issue with profiles. The Opera solution is ready and very good, but users might be better informed about it by Introduction or Help Department.

Thank you.