Two editors are available to program a block: the SFC Editor and the Block Editor. The use of the editor depends of the block type: SFC or Dataflow.
The only editor of a Dataflow block is the Block Editor allowing the user to create and connect the elements of blocks.
The main editor of a SFC block is the SFC Editor allowing the user to sequence the execution of function and blocks. However, the Block Editor can also be used, allowing the user to connect the ports of the block's instances.