Reaction Association
Use Add reaction to drag and drop complex chemical diagrams into your documentation.
Reader: UserThe Add Reaction function lets users drag and drop reactions onto elements, making the interface more interactive and intuitive. As a result, the Export/Import Collection function and the Reporting function will also include reaction data.

Add reaction button
YouTube will track your interaction with them.
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The 'Add Reaction' feature is only available for Generic Element and Segment.