Hi, 

I have already responded to you in the private support thread but I will paste my response here as well:

I have reviewed the information in the private thread that was submitted and here are my observations:

1) To enable keyboard navigation, the Kendo UI Grid should be set as navigatable:true

2) When Enter is pressed it is expected that the focused row should be open for editing, The grid should be configured for CRUD operations:

https://dojo.telerik.com/@bubblemaster/adoKodUT

3) If another Enter is pressed, the row closes

If you wish to expand the details you should use Alt + left/right arrow

If you wish to persist the expanded rows upon data binding of the master grid, you may check the how-to article at:

https://docs.telerik.com/kendo-ui/controls/data-management/grid/how-to/state/persist-expanded-rows

The only thing that I noticed is that we could focus the expand/collapse cell and when the user presses enter to toggle the detail visibility. Do you think that this could be a nice addition to the keyboard navigation?

In case we have missed anything, please advise.

Look forward to hearing back from you.

Regards,
Alex Hajigeorgieva
Progress Telerik