The command for changing the primary power tray is "goto_tray #", where # is the number of the tray you want to change the primary tray to.
So for example the following bind would switch you to Bright Nova form and select tray number 4:
/bind n "powexec_toggleon bright nova$$goto_tray 4"
or if you prefer using macro buttons, the following would return you from either Dwarf or Nova back into Human, toggle on your Smash/Lethal shield, and switch back to tray 1:
/macro HU "powexec_toggle_off bright nova$$powexec_toggle_off white dwarf$$powexec_toggleon shining shield$$goto_tray 1"
Oh and for future reference, this section is for posting actual guides - if you are just asking a question it is better to post it in the Player Questions section 
.
Apologies, you're right it should have gone in questions, I was looking around for a guide for it in this section and wasn't paying attention when I posted.
However, that's exactly the information I needed and more. Thanks, Brev
What about changing the Alternate trays as well. Are there commands for them? Seems to me there would be...
goto_tray - Go to specified tray number.
goto_tray_alt - Go to specified tray number.
goto_tray_alt2 - Go to specified tray number.
goto_trays_tray - Go to specified tray number in the specified tray. Syntax: goto_trays_tray <SHOWING TRAY NUM> <TRAY NUM between 1 and 10>
See : http://boards.cityofheroes.com/showflat....ev=#Post4837240
My suggestion for Kheldian macros are this (adjust for PB/WS):
/macro Nova "powexec_toggle_on Dark Nova$$goto_tray 9"
/macro Dwarf "powexec_toggle_on Black Dwarf$$goto_tray 8"
/macro Off "powexec_toggle_off Dark Nova$$powexec_toggle_off black dwarf$$goto_tray 1"
This works best with an extra mouse button to bind it to, but it isn't necessary. I would suggest putting the Nova Macro in tray1 slot9 and dwarf in tray1 slot 8. This leaves tray1 slot10 for a travel power which can be bound to a button or better yet a mouse button. Then when you hit your 8 button (or the mouse button that activates tray1 slot8), it will switch into dwarf mode, swap trays to the one with dwarf powers. Put the dwarf teleport in tray8 slot10, off in tray8 slot8, and 2nd copy of Nova into tray8 slot9. Do the same for nova.
So here is a recap of what you end up with (or what I end up with as a Warshade)..
Tray 1 Human form. Mouse 4teleport, mouse 5 nova. ctrl+mouse 4 recall friend, ctrl+mouse 5 dwarf.
Tray 9 Nova form. 1234 for attacks, mouse 5 Off, ctrl+mouse 5 dwarf. In slot 7 is nova toggle power so it's visible and can be hit again if detoggled.
Tray 8 Dwarf. 12345 for attacks. Mouse 5 off, ctrl+mouse5 nova, mouse 4 teleport. In slot 7 is dwarf toggle power so it's visible and can be hit again if detoggled.
See it's that simple. So simple I can barely explain it in a page worth of text. Well it's simple in game anyway,
Just wondering if there's a command that you can include in a macro to change your power tray.
I was messing around with my PB and I thought "It'd be really cool if I could create a macro to change my form and bring up the tray that holds all of it's powers." Sadly, my knowledge of macro/bind commands is sorely lacking. Is there anyone out there who can help me out with this?