Zoom Feature in Genome Display Tool. Figure 2 displays the zoom functionality available with Genome Display Tool. On right-clicking on any gene, the user is presented with the choice of zooming into that region of the genome or, writing out information matching that of the particular cell, its upstream region or its downstream region into a tab-delimited text file. Based on whether the user chose to view interesting information in the upstream or downstream region of the gene, and whether such information is present for the gene in consideration, the latter two choices are enabled or disabled. The zoom functionality results in a separate window showing the region of interest in higher magnification, while retaining the larger display, as shown.