## 1.3 How to use this manual

The best approach is to read this chapter, then read the command summary at the beginning of chapter 2, then run the examples in the tutorial section. Later, when you want to use the advanced features, go back for more detail.
This manual is designed as a reference for users who are familiar with circuit design, and therefore does not present information on circuit design but only on the use of this program to analyze such a design. Likewise, it is not a text in modeling, although the models section does touch on it.
Throughout this manual, the following notation conventions are used:

- `Typewriter` font represents exactly what you type, or computer output.
- `Underlined typewriter` font is what you type, in a dialogue with the computer.
- Command words are shown in mixed UPPER and lower case. The upper case part must be entered exactly. The lower case part is optional, but if included must be spelled correctly.
- Italics indicate that you should substitute the appropriate name or value.
- Braces { } indicate optional parameters.
- Ellipses (...) indicate that an entry may be repeated as many times as needed or desired.