■ Suspends project execution when the specified condition
  becomes true. The condition may be either:
    • A variable name
    • A relational statement
 
■ A relational statement is constructed using these
  operators:
    • =  Equal           • <   Less than
    • <> Not equal       • >=  Greater than or equal to
    • >  Greater than    • <=  Less than or equal to
 
■ If you enter only a variable name or expression, the
  environment assumes the relation "<> 0." For example,
  entering X + Y yields this expression:
 
    X + Y <> 0
 
■ Tip: Use Add Watch instead of Watchpoint to display
       variable values as they change during project
       execution.
 
■ To enter a watchpoint:
    1. Type in a variable name or expression.
 
       Enter expression (will break when TRUE):
       ┌─────────────────────────────────────────────────┐
       │                                                 │
       └─────────────────────────────────────────────────┘
    2. Press Enter or choose OK to add the watchpoint,
       ╔════════╗
       ║   OK   ║
       ╚════════╝
       or choose one of the following:
       ┌────────┐
       │ Cancel │  To cancel the operation
       └────────┘
       ┌────────┐
       │  Help  │  To get help
       └────────┘