The node size dialog tells you the size of a node and shows the distribution of the node's data throughout the file.
The top of the node size dialog gives the total number and size of the blocks which logically make up this node.
- Data BID Size The amount of data contained in the data blocks of this node
- Subnodes BID Size The amount of data contained in the subnode blocks (including all subnodes, recursively) of this node
- Total Size The sum of the above two.
Below this is a area which represents the file. The upper left corner is byte zero, the lower right is EOF. The title of the dialog indicates how many bytes each pixel represents. Black pixels are areas occupied by this node (or a subnode), white areas are
not. Gray areas are areas which are past EOF.