[GRASSLIST:218] How can I reduce raster file sizes?

[Michael Rensing]

I would like to be able to take a raster and reduce it's size for faster 
loading when I'm displaying the map for wide regions. I thought that by 
resampling I could reduce the resolution and hence the number of pixels, 
but the file I created is exactly the same size as the original. Can 
anyone confirm that resampling is the way to reduce the raster size? If 
so, can you tell me how to do it? If not, is there a way to accomplish 
what I want?

Regards,
Michael