IGB displays insertions, deletions and mismatches as color-coded bases and icons on top of read alignments, as shown in the following image.

• Insertions - bases flanking insertion site appear are shown in white with a black background; triangular shapes between them point at the location of the inserted base or bases that are present in the aligned sequence but not in the reference. Select an insertion to display the sequence of inserted bases.
• Deletions - bases deleted in the aligned sequenced relative to the  reference appear in gray with underscore characters
• Mismatches - bases in the aligned sequence that do match the corresponding base in the reference appear as higlighted bases. To highlight mismatches, clickLoad Sequence.