Can I view exons, introns, and flanking sequence to a transcript?
For a colour-coded sequence showing exons including untranslated regions (UTRs) and introns, click on any transcript. From the transcript tab, click on the Exons link at the left. The Exons page allows you to view the transcript sequence, along with flanking and intronic regions.
A short video describes this view.
Click on the configure this page link at the left and customise your view. Or, try BioMart for sequence export.