The Current Sequence panel used to be part of the Data Access panel in IGB versions up to 6.4. To improve ease of use, it was moved to a side tray position (it can appear in either the left or right trays) so that it could display more sequences; while species with assembled genomes have a lower number of whole chromosomes, some genomes only exist as contigs, and these genomes have tens, hundreds or thousands of assemblies that need to be displayed. We have found that the portrait display of these sequences allows users to more readily find particular sequences.
The sequences that are displayed in this tab can be sorted by name or by size. Clicking the column header 'Sequence(s)' will sort by sequence name in alphabetical order (red box). Clicking on 'Length' will sort the sequences by size (blue box). An additional piece of information is the number next to 'Sequence(s)', which indicates how many sequences are present in the genome version (purple box). In the image below, the sequences have been sorted by size in descending order.
Most genome versions will have the option of being displayed as 'genome'. This option is found at the bottom of the 'Sequence(s)' list if it is available (and has not be resorted). What this option does is show every annotated sequence in the main window in a linear arrangement, leaving a space between each chromosome/ contig (red arrows). In the coordinate axis, IGB will show you the relative length of each chromosome as black bars, and show the 'gaps' as white space (red box). To display the entire genome, all of the data must be loaded. For organisms that have an autoloaded reference sequence, such as human, mouse, Drosophila, Arabidopsis, etc., you can select genome immediately (picture below shows the whole genome displayed for Arabidopsis). For other organisms, you will need to load each chromosome or contig individually.