Default blocks are those blocks, which can be seen directly at the beginning of the creation of a rule or action on the grid interface. The user is allowed to move these blocks, but they cannot be deleted. The following default blocks exist for a rule:

If you would like to create an action, the following default blocks are provided for this purpose:

The basic structure of a block and the fundamental structure of the corresponding "Properties" window is described in detail in 3.6.1 The General Structure of a Block.