The Slimmer tool allows you to map the granular annotations of the query set of genes to one or more high-level, broader parent terms referred to as GO Slim terms. This is possible with GO because there are parent:child relationships recorded between granular terms and more general parent (ie. GO slim) terms. The Slimmer tool can be useful in reporting the results of GO annotations of a genome, analyzing the results of microarray expression data, or cDNA collection using a high level view of the three ontologies.
More information about this tool can be found in the manual.