Re: I have a question about how to use CAD program to do woodworking?

Make the 2x4 a block and insert it in the drawing.....At least that's is what I do in AutoCAD.....Brian
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Most CAD packages have add in programs for specific disciplines. It makes a big difference if you are working in 2D or 3D. The things you are looking for are called "symbols" or "blocks" or "cells" and are usually group in "libraries".
Most CAD systems let you make your own symbols and since you want wood shapes it should be pretty easy.
There are many CAD concepts that you need to grasp to make use of the virtual design world. First parametrics, a parameter (value) that drives the size of an entity. Second Polylines, a single line with multiple segments. So a rectangle is one line not four lines that need to be moved together. A closed polyline, like a rectangle is a third concept called a profile. And a forth concept is proflies can be extruded, viola 3D.
So one rectangle with parameters controlling it's sides and another controlling the extruded height gives you a infinite rack of wood from a sheet of plywood to a 2x4.Just copy and change the parameters
Final concept of assembly constraints allows you to mate one face to another to assembly projects. Constraints can contain rules like centered between to points or offset x from an edge.
Lots to learn. Not sure if TurboCAD uses this exact language but the concepts should be there.

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