# Part II: Adv3Lite In Depth

This section looks at important Adv3Lite programming topics in detail. Most authors working with TADS3/adv3Lite will encounter these topics at one point or another.

An Annotated Transcript
Action Results
Verify, Check, and When to Use Which
How to Create Verbs
Custom Preconditions
Message Parameter Substitutions
Implied Action Reports
Customising (and Using) Existing Action
Tips: A Context-Sensitive Help System
Creating Dynamic Characters
NPC Travel
Using the Banner API

TADS 3 Technical Manual
Table of Contents | Adv3Lite In Depth
Prev: Bibliographic Metadata - the GameInfo Format Next: Where Messages Come From