You can rearrange the columns - there can be other ones to the left of the outline column, for example. However, the outline indenting will always be attached to the same column.
I'm not sure if there's a feature request open on the ability to change that, but if it's something you'd like to see added, please send an email to the
support ninjas and let them know. They can create a new item in the development database on this. (Or attach your email as a vote for the change if an item already exists.) Thanks very much!