Is it possible to set indent settings in Xcode per project (or per file, even)?

Question

Some projects I work in uses tab key settings that equate to 3 or 4 spaces and another wants actual tabs. Another mixes the two depending on directory.

Is there some way to set these settings per project, or even better, per file? If not, does someone have a clever way of dealing with this? (besides "just remember which setting you should use and change it before you start editing")

Answer 1

This seems to have changed with Xcode 4 ... if you click on a file, group or project, amongst the items in the Utilities bar (at the right-hand side, by default) is 'Text Settings'.