How Do You Make a Diagonal Cut to a Layer in Photoshop CS5

[Guest]

I'm wanting to make a diagonal cut and can find no information about how to do this.  Help!!  Thanks!! 

[c.pfaffenbichler]

Could you elaborate?

I suppose Vector Masks (or Layer Masks) may be an option.

[c.pfaffenbichler]

[Guest]

I have a layer which I would like to cut across diagonally.  I don't know the steps and can't find information on how to do this.  Thank you!

[c.pfaffenbichler]

So you want two separate Layers afterwards?

[c.pfaffenbichler]

Easiest way might be Polygonal Lasso Tool and command-shift-J.