1. In a computer display system including input means for receiving coded sequences of signals, processor means for storing a control program, output means responsive to said control program and said coded sequence of said signals for displaying two-dimensional shapes, storage means for hierarchically storing a set of ideograms, and means responsive to one of said coded sequences for controlling said storage means to provide to the said output means for display thereon one of said ideograms in a predetermined space; the improvement comprising: reduction means responsive to said control program for selectively reducing at least one dimension of at least one of said ideograms by selecting pixels in said one ideogram which may be omitted while retaining the intelligence associated with the ideogram; position means responsive to said control program for placing said one reduced ideogram adjacent a second ideogram for simultaneous display on said output means in the same predetermined space.