When I’m viewing some tables in the Schema Browser I am able to select multiple cells or rows very easily in the data grid by dragging the mouse, or shift key + arrows. For other tables, I can only select a single cell and that’s it. For the tables where I can do multi-select, it shows a hollow triangle looking icon in the leftmost grey column. For the tables where I can only select a single cell, it shows a solid black triangle. I want to be able to do multi-select in these tables too.
Is there an option that needs to be set/unset? Why does single select seem to only happen for some tables and not others?