Edit Several Entries at Once
Steps
XWiki 18.7.0+
Edit several entries of a Live Data in place, with edit mode, which displays every hidden column and turns a single click on a cell into an edit.
Change the Values of Several Entries
- Click the Edit mode toggle in the Live Data menu.

- Click the cell to change and set its new value.
- Press "Tab" to save that cell and open the next one, or "Shift+Tab" for the previous one, until every value is set. Each cell is saved as it is left, so there is nothing else to confirm.
Create an Entry
- Click "Add entry" in the row at the bottom of the table.

- Fill the cells of the draft entry, moving between them with the mouse or with "Tab".

- Click the "✓" button on the right of the draft entry, or press "Return", to save it. The draft row is replaced by a normal entry of the Live Data.
FAQ
Why is there no Edit mode toggle on my Live Data?
Because the source of its entries does not support Edit mode. The Live Table source does, but only when the author sets its hasEditMode parameter to true.
Why is there no "Add entry" row?
Because the source does not support creating entries, or you do not have the right to create content where they would be stored.
How do I discard a draft entry?
Click the "✗" button on its right. The draft entry is deleted and nothing is saved.
How do I save an entry and immediately start another?
Press "Ctrl+Return" instead of "Return".
Where are the entries I create stored?
Where the source decides. The Live Table source stores them under its newRowLocation parameter, with names produced by its newRowNamingStrategy one.
Why does my Live Data not offer edit mode?
Because the source of its entries does not support it. For the Live Table source, the author of the Live Data has to set hasEditMode to true.