A small fix/request:
When editing cells in the data table, it does not appear there is a way to escape the editing paradigm. You can hit enter or return to go down in the column, tab to go to the next column, shift tab to go to the previous column.In all of these instances you are still editing the cells. In excel or numbers, escape will take you out of the cell-editing mode, and I think it makes sense for DataGraph to follow this standard.