Block History

When an operation is applied to a block, that operation gets recorded in the block's operation history. Using the ID Blocks option displays a block's history of operations using the following notation:

DRT	Dragline right toe
DC	Dragline Centre
DLT	Dragline left toe
BL	Bulldoze left
BR	Bulldoze right
AB	Area balance
AR	Area reshape
ACF_F	Area cut & fill - Fill block
ACF_C	Area cut & fill - Cut block
SP1	Split block - Block 1
SP2	Split block - Block2
MB	Merge block
RB	Remove block
EX	Export block
NULL	Nullify Block

This notation is also used for recording blocks in a dragline macro.