Altium Designer Documentation
...
PCB Query Functions
Layer Checks
OnBottomLayer
Created: September 02, 2015 | Updated: August 20, 2021
| Applies to versions: 15.1, 16.0, 16.1, 17.0, 17.1, 18.0, 18.1, 19.0, 19.1, 20.0, 20.1 and 20.2
Now reading version 20.1. For the latest, read: OnBottomLayer for version 21
Parent page: PCB Query Functions - Layer Checks
Summary
Returns all objects on the Bottom Layer.
Syntax
OnBottomLayer : Boolean
Example Usage
OnBottomLayer
OnBottomLayer = True
Returns all objects on the Bottom Layer.
Not OnBottomLayer
OnBottomLayer = False
Returns all objects except objects on the Bottom Layer.