Many of the standard function blocks are extensible. This capability means you can increase the number of some of the parameters. The function blocks that are extensible are: Add, And, BFI, BFO, Calc/Logic, Multiply, Multiplexer, Or, and Signal Selector.
For example, you do not have to join together multiple ADD blocks to add more than two numbers together. You can extend the number of input parameters on the block and wire as many as 16 values into a single ADD block.