Is there a full manual?

[FunkThompson]

I'm having trouble, I can't seem to figure out how to set a parent - I want to create some moons around a planet, but the moons orbit the sun, not the planet, if I choose orbit parent...

[atomic7732]

they are probably out of reach of the planets gravity (Hill Shpere)

[Dan Dixon]

Parent child relationships are dynamically calculated based on their distance and mass. There is no way to force a body to be the child or parent of another.

NeutronStar is right: The bodies aren't close enough to each other. Press and hold the Shift key to toggle the Hill Sphere (although this is not related to how the parent-child relationships are calculated).

What is the hill sphere?
http://en.wikipedia.org/wiki/Hill_sphere

You can toggle parent-child lines by pressing the semicolon key (.
Now move the bodies close to each other until the lines connect. (Hover your mouse over a body, then hold down the (M) key, move the mouse around to move the body, then release the (M) key to drop it.

And unfortunately at this time there isn't a full manual.

[FunkThompson]

Thank you.