オプション・キーワード

grandMA3 ユーザマニュアル » コマンド構文とキーワード » オプション・キーワード Version 2.2

Option keywords can be seen as temporary filters in commands. You can use them to define your command in an even more detailed manner.

The result is always a single event - that is, it will not be set permanently as it is the case with settings for example.