Overview: Using Constants

Constants, or Defines, exist at Internal, Global, and a Local level.

Level	Scope
Internal Defines	All the projects present on your machine The complete assembly of all connected parts or devices, of which at least one is movable..
Global Defines	All the programs The act of performing a sequence of instructions or commands. in your project. These are user-defined.
Local Definitions	Only the current program currently open.

Level

Scope

These are user-defined.

Only the current program currently open.

How to define constants

Double click on the Defines item in the Project Tree.
Use the text editor to create the defines using the following syntax.
```
#define   Identifier   Equivalence   (* comments *)
```

See Use the Defines List for more in-depth information.