"Data" addressing

When an action or configuration file requires a data address, the following syntax options are available:

syntax description example
pcb currently edited board's data pcb
buffer#IDX one of the paste buffers; IDX is an integer starting from 0 buffer#2
use data in paste buffer number 2
buffer currently active paste buffer buffer

Note: "data" in this context means a database (that holds layers and global objects like subcircuits and padstacks), not actual data (as in drawing primitives).