How do you modify a solid that has already been drawn?

Help!
3D Woes
How do you modify a solid that has already been drawn?

For example, you draw (or seek to modify a block someone else has
drawn) a molding 3ft and you need it 2ft. I am having 0 success at
modifying the solid in any way once its been drawn.

I really need someone's help. Please help!

I have searched high and low, consulted books, etc. But I am coming
up short. Perhaps its due to my being a newbie to AutoCAD (2 months).
I am using AutoCAD 2004. I am earning while learning, but I've got to
kick it up a notch--soon --you know?

Thank you for any help you can throw my way,

Derek

 

Start with SLICE.
Look up SOLID EDITING in HELP.

 

AutoCAD has a completely different set of editing commands for
solids, which is frustrating. When you are looking at a rectangular
object, there is no way to know if it is a polyface mesh or an ACIS
solid (3d-solid). The problems start when you are editing an object
with a mixture of the two kinds of 3-d objects. A 3D solid will move
if any part of it is included with a stretch, and it will not stretch.

Here is a site that has a nice video about solid editing. Their
product is one that examines the solids and creates a list of pieces
with their dimensions. But their video is nicely done and does show
some of the basics of solid editing.
http://www.smartlister.com/index.htm


Joe Dunfee