Thank you for the reply. It would have been nice to know. Firefox is my main browser but I'd been trying Vivaldi which has tab stacking and speed dial but it is too buggy for daily use.

New to Opera.
Using a new Lenovo Yoga ThinkPad fully kitted out with touch screen and 8Gb RAM, etc.
Using WIN 8.1
Opera v30.0.18xxxx
Downloaded Opera, because it has tab stacking.

Problem, when I drag a tab onto another tab, there is no stacking. Dragging it just moves the tab to the place that the tab I want to drag onto is. I've watched the YouTube video and I've done a search in both the forum and web only to find there was a stacking bug which has been fixed as this was reported 2-years ago.

This should be working out the box without my changing setting (which I haven't done).

Help welcome and I thank you in advance for replies.