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The following image shows how this works. The top panel of the IGB Main View window shows the normal, non-spliced view of a region containing overlapping genes from a human, AGBL4 which contains several very large introns, one of which completely encompasses another gene, BEND5. The The Sliced View panel on the bottom shows AGBL4, and then BEND5, but with the intronic sequences gaps between exons reduced to 100bp. The points where the introns were shortened appear as black hash
Black has marks in the Sliced View coordinate axis of the Sliced View tabindicate points where sequence was deleted from between the exons. Note how the Sliced View makes it easy to see the gene structures, whereas in the main view the exons of AGBL4 are so small it is impossible to even see size comparisons of the exons it containsunderstanding and visualizing the exons easier than in the Main View, where exons are dwarfed by the much larger intronic regions.
Sliced view example (click to enlarge)
Sliced view example (click to enlarge)
