One feature I really feel the need of is the possibility to have graphical display of the indent level of the rows.
Since I'm working with big files of data, sometimes I don't have the father row and the children ones (which have been indented) on screen, but I have to scroll the sheet. When working with multiple levels of indented rows this can lead to some mistakes, since I have to check the that the rows are aligned on the same level of indent, with the risk of having some data hidden within a lower level of indented rows.
The possibility of having a graphical display of the indent level of the rows would be really appreciated, like an arrow starting vertically from the father row and pointing horizontally at each child row.
Thanks for your attention.