Comment 2 for bug 570978

A few ideas collected through #exaile:

1) It is most likely preferable to switch to a special editing mode upon pressing the editing key (F2 is preferred, long single left click could be available as an option).

2) In that mode one can switch between columns via Tab and Shift-Tab.

3) In that mode one can freely navigate between columns and rows via Alt+<Arrow> (<Arrow> being Up, Down, Left or Right)

4) In that mode one can directly jump to a column via Alt+<#> (<#> being 0..9)

5) All changes are undone by pressing the Esc key. This also exits from the editing mode.

6) Changes can be undone in place