You can add or edit comments in a time grid mode. You can enter more than one comment for each row, and these comments are displayed as a log. You can enter a maximum of 300 characters in the comment.
Procedure
1 Select the element, and then click the time grid link to the sheet.
2 Hover the mouse in the left column.
The tooltip “Double click to add a comment” appears.
3 Click the cell to add a comment, and then click OK.