Double-clicking on a cell, pressing the ENTER key, or selecting the Edit Cell command will allow you to edit the selected cell.
During the Cell Selection Mode, pressing the RIGHT or LEFT key moves the cell right or left. If the Cell Selection Mode was selected after a CSV document is opened, the CSV delimiters will be hidden, and you can select cell(s) by the mouse or keyboard like a spreadsheet program (Excel).
The Cell Selection Mode was added, and CSV editing was greatly enhanced.