[Qgis-user] Changing project resolution in qgis?

[Kurt Springs]

Hi,

I was wondering if it were possible to change a projects resolution in  
qgis.  I my project area consists of twenty one raster maps plus  
vector maps for the water (coast, lake, river).  I am adding in point  
vectors for archaeological sites. I get so far, and can go no further,  
because I the map is too big.  Each raster map is of a 20km by 20km  
region, at a 10m resolution.  I am thinking that the resolution  
doesn't need to be this high so I wanted to change it to a courser  
resolution.  I checked through the menu and didn't see anything that  
would obviously do this.

Can anyone help?

Kurt Springs