Forcing alignment to plane

[MarkEMark]

Simple Newbie question:

I have drawn some geometry and it is slightly skewed to the plane I drew it in (not sure what I did...)

If I want to force something to a plane, what command do I use and how do I do it?

Thanks!

Mark

[TIG]

There are scripts to 'flatten' geometry - if that's too draconian try using the Sandbox tools to Drape the edges down onto the surface a a large rectangle you've drawn below it so again then are coplanar...
A little more detail about this mess-up might help us tailor a better response ?