I am trying to figure out how to display a single dbSNP entry as a separate track in the UCSC Genome Browser instead of all the entries from the dbSNP 142 database. Is there a way to enter the rsID to only show the single SNP?
You can't modify 100% the way the genome is displayed in UCSC, though if you click on the left grey pane of the dbSNP you will have access to some options.
If what you're looking for isn't there, you can download the dbSNP on your computer and look at it by region or whatever criteria you have. They have a MySQL table format that you can just copy-paste in your mysql, then query what you're looking for.