Gerda

After speaking with @joserodolfofreitas, how do we feel about something along these lines to show column grouping (grouping by text size + border-bottom)? This would require having the [column separator...

> In the demo, the information still seems clear without the additional type sizes, so perhaps this is ok to keep constant. I am seeing some differentiation in text weight...

>From a visual design perspective, I'm used to column groups that have the same height. I would be curious to see if it's common to have different heights. I mean,...

Was there a decision made for the default group header size? If we plan to support filtering, sorting, and other actions available in the column menu, should we consider match...

I'm curious for the day field in [this preview](https://deploy-preview-5504--material-ui-x.netlify.app/x/react-date-pickers/date-field/) — month seems to truncate to 2 digits and year to 4, but day seems to allow you minimum 3 digits...

Continuing the conversation from #5504 for more general customization options: > For now the placeholder of an empty section is the name of the section (`month` for a month section...

Thank you for this resource! It looks great. > (I would probably write `aaaa` for a 2 letter year format). Just to clarify — was this intentional? 4 placeholder letters...

What about using chips for shortcuts? Perhaps this might be easier to stack vertically in mobile as well. 

Added a few more examples above! And here's an exploration of ways to show this that allow for current features + upcoming ones: | All columns visible | Mixed visibility...

Thank you for reviewing this during our check in @joserodolfofreitas ! Here is the update with adjusted sizes for minimum touch target size (44px). The eye icon was previously 36px;...