Compute mutual information of your sequence alignment. You can submit the data by pasting the alignment, or read it from a file. When the processing is done you can zoom around in your plot as much as you want. For pure sequence information go to sequence-structure logos.For publication of results, please cite
MatrixPlot: visualizing sequence constraints. J. Gorodkin, H. H. Stærfeldt, O. Lund, and S. Brunak. Bioinformatics. 15:769-770, 1999.