bookmark Dotter Analyses genomic DNA and Protein sequence. Dotter provides a tool to explore the visual appearance of this landscape, as well as a tool to examine the sequence alignment it represents. It runs linear in space so has no practical limit for the length of sequences. The user can 'play' with the min and max cutoffs until achieves the optimal separation between noise and signal. The tool can be used for displaying dot-matrices generated by other programs. The software is a part of the Seqtools toolkit.