A single optional parameter appears below the horizontal line that marks the main path.
The following is a diagram of a statement with an optional parameter:
►►─ COMMAND ─┬─────────────┬──────────────────────────────────────────────────►◄ └─ PARAMETER ─┘
You can choose (or not) to use the optional parameter, as shown in the following examples:
COMMAND COMMAND PARAMETER
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