How to delete matrials and textures?

I’ve been wondering for a long time on how to delete matrials (the matrials in the materials panel) and textures(Textures as in UV maps)… I’ve that you need to take off the F save, quit and when you open them again it’s gone, but that doesn’t need to work :confused: Maybe I have objects using the same texture or material… Maybe, but is there a way to just delete it?

I need this because I think my .blend would be much lighter for people to download when I release a game that I am making…

Thanks for you support guys,

That is the only way. Save and re-open.

what about UV Textures?

There is a clear button next to the texture and delete button press the delete.