| # Viewing Option Combination - Expressions Boolean logic
`( BodyColor = RED )` | Selects all red cars.
`( BodyColor = RED _ and WheelColor = GREEN )` | Selects only red cars that have green wheels.
`( BodyColor = RED _ or WheelColor = GREEN )` | Selects all cars which are painted red plus all cars that have green wheels (so 'or' means and/or).
Nested statements The following two statements have the same operators, but a different nesting structure: `BodyColor = RED and ( SeatColor = GREEN or WheelColor = BLUE)` `(BodyColor = RED and SeatColor = GREEN ) or WheelColor = BLUE` A yellow car with blue wheels fits expression 2 but not expression 1. Note You can check whether the expression is valid from the Specific menu. Related topics Assembly control overview Line station variants and line station orders Assembly orders |