In certain zoom I see many city labels "written" on each other. I know there is a feature that set to auto hide labels that override each other ( and I'm not talking about rendering from specific scale...) Where can I find it in QGIS?
Today (in 1.8), you have two choices of labelling:
The new one has collision detection, while the old one will be removed with the next QGIS version. So you better switch over to the new one.