Sequences downloaded and imported using the tool:

Download | Search for Sequences at NCBI

are imported as stand-alone sequence objects or sequence lists.

These are easily converted to tracks by using the tool:

Toolbox | Utility Tools | Tracks | Track Conversion | Convert to Tracks

You can download any set of sequences and convert them to Tracks if you wish.

Relevant manual links:

Searching and downloading sequences from GenBank - the NCBI Entrez database:
http://resources.qiagenbioinformatics.com/manuals/clcgenomicsworkbench/current/index.php?manual=Search_Sequences_at_NCBI.html


Converting to tracks:
http://resources.qiagenbioinformatics.com/manuals/clcgenomicsworkbench/current/index.php?manual=Convert_Tracks.html