Automatic Marker Wizard
The track marker wizard is a handy way to add multiple track markers at a time.  You can either choose to add markers at specific intervals, or you can add markers based on the silence in a sound.  It will even remove the silence!  This can be very handy if recording albums from the Internet, LPs or cassettes and need a quick way to break up the tracks!

Choose At Intervals Of to set markers at an equal spacing for a period of time.

Based On Silence Of Sound
Choose Based On Silence Of Sound to create markers based on the gaps of audio in a recording.  

Select the sound to create markers based on from the drop down.  Each new marker will be created based on a detected threshold of silence (The default Silence is 7% of Full Volume).  In order to create a track marker, there must be a minimum number of minutes before considering a new track marker (The default is one minute).  Click Remove And Trim Silence to make sure that it removes silence and splits the recording into multiple clips.  Choose Fade Edges By to set the number of seconds to fade the start and end of the clips by.

CD Track Markers
Choose CD Track Markers to make each new track created also be a CD track marker for burning to a CD.

More on Markers..