Thanks Keith, I got instructions on how to do that from the New Jersey forum. I didn't read far enough in Marks Easy Manual yet to see that CTCSS/DCS is the same as PL/DPL.
To anyone else who has the same question as I had here are the instructions on how to set the PL/DPL's on a BCT15X.
Press Menu
Highlight Program System and press E
Highlight the system the frequency is programmed into and press E
Highlight Edit Group and press E
Highlight whatever group the frequency is programmed into and press E
Highlight Edit Channel and press E
Scroll to the channel the frequency is in and press E
Highlight Set CTCSS/DCS and press E (CTCSS is the same as PL and DCS is the same as DPL)
Highlight CTCSS for the PL and select the PL tone using the scroll knob. When you find it press E
Or...Highlight DCS for the DPL tone,select it using the scroll knob and when you find it, press E.
When you're done, press scan to get back to normal scan mode.
BCT15X PL/DPL