We have added several new user-configurable display options to the Genome Browser that expand navigation within gene, mRNA and EST-based tracks and allow increased manipulation of the tracks image and track control groups. These options are controlled on the browser configuration page, which is accessed through the ‘configure’ button on the Genome Browser gateway or tracks page. When the ‘Next/previous item navigation’ configuration option is toggled on, gray double-headed arrows display in the Genome Browser tracks image on both sides of the track labels of gene, mRNA and EST tracks (or any standard tracks based on BED, PSL or genePred format). The image window may be shifted to display the next track feature towards the 5' or 3' end of the chromosome by clicking the corresponding left or right arrow. Similarly, the ‘Next/previous exon navigation’ configuration option displays white double-headed arrows on the both 5' and 3' end of each track item that has exons positioned beyond the edges of the current image. Clicking on one of the arrows shifts the image window to the next exon located towards that
