Add step blocks
A step is usually defined by a series of events (event lists) that must occur in a specific order. However, you can add unordered, optional, and exit block steps to alter this.
Procedure
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From the Add Event screen, click on the required operator:
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Add Unordered Step Block: Unordered step blocks create a step definition where all events in the block must occur, but they can occur in any order.
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Add Optional Step Block: Optional step blocks create a step definition where only one of the events in the block must occur.
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Add Exit Step Block: Exist step blocks create a step definition where a specific step must not occur. If the step occurs, the step will not complete.
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Click on Add to Step button to add steps to the block. Move the steps by dragging or using the arrows. The steps appear indented when part of a step block.