# 3DEC Modeling

This section generally introduces 3DEC and providing an overview of modeling with the program. Many subjects introduced here are more exhaustively documented in later parts of the Help. It is divided into three major parts.

This section, as its name implies, gives the user a first look at the program, its features, tools, and utilities, as well as its design and its uses.

This section is optimal for the user who wants to dive right in. It contains tutorials that will provide step by step guidance on the most fundamental tasks involved in working with 3DEC.

This section provides an up-close look at the methodology of sequential modeling that is used to construct the 3dec model.