Does anyone know how to use the new Place Holders?

[MiNuN]

<stpc>Display a target cursor to select player characters only<stnpc>Display a target cursor to select NPCs only<stenemy>Display a target cursor to select enemies you can engage<stenmity>Display a target cursor to select enemies you have incurred enmity from<stparty>Display a target cursor to select party members only<lastat>The last character that attacked you

I am having a bit of trouble understanding

[PeaceWalker]

You're supposed to use them with a macro.
For example:
/ac "Cure II" <stpc>
This will make you only target friendly players when you are given the chance to select a target.

[MiNuN]

Thank you!