Working with UML Packages

[M]

Hey, all -

The following questions refer to Visio Pro 2003:

I want to create a single UML diagram showing class elements in separate
packages. I'm having trouble getting going with this:

1) How do I insert a class element into a package? I put a package on a
drawing and it opens a new drawing. If I put a class element into that new
drawing, it doesn't appear in the package element in the first drawing, and
there is apparently no way to insert directly insert an element into the
package element in the first drawing.

2) How do I resize a package vertically? There are horizontal resize
handles, but no vertical ones.

Any assistance appreciated.