Just noticed that the first column in the data editor (along with the row number) is now static! This makes it much easier to see what row you’re trying to reference when working with a lot of columns. My only feedback is that it would be great if you could set a specific column as the frozen column, but I guess it can always just get dragged to the first position.
Highlighting a row also stays highlighted as you move across now! Awesome!
Also just noticed that column groups are displayed above the header and you can click on them to collapse or expand.
mmm, looks a bit buggy though. I see duplicate column groups in my apps.
Awesome feature though. Will be great once the kinks are ironed out.
Edit: Here’s a short video. @SantiagoPerez asked me to post this.
Any chance there’s a space before the slash in one of those (making them not identical)? Has happened to me before, so just checking in case it’s the same!
Zero chance. I never use spaces in my column group names. Ever.
Column groups are sparse at least for now. The headers dont force them all to be together 
But the columns being duplicated across multiple groups is a bug, surely?
It’s not being duplicated, its just when you click to “expand” a group the scrolling doesn’t auto-adjust like you’re expecting which would be an obviously great feature to add and I will do so. Basically you are scrolled 0 pixels to the right and when you expand a group you are still scrolled 0 pixels so it just pushed the items you are clicking to expand off the right edge. Woopsie daisy.
okay, I get it…
Now with “Add column right” it’ll be quicker and easier to keep column groups tidy.
I saw this yesterday. When I added a rowID column to my sheet the grouping is fixed.
For the time being this is intentionally because when the 1st column is fixed as you speculated and once your scroll horizontally this distinction because mandatory.
