Invoke Reaction is an action that triggers a previously defined reaction of the Helper Companion.
Basics
This action is closely related to the Invoke Trigger action, it is used to invoke a Helper reaction within any trigger. It can occur in a reaction itself, so you can configure nested reactions.
Working with the Invoke Reaction action
Add Invoke Reaction action
Click + Add Action in the side panel under the trigger you want to assign the action to.
From the dropdown...
...select the Invoke Reaction action.
Edit properties
In the side panel, go to the action you are looking for.
In the side panel, click the Select Reaction dropdown.
Then select a previously configured reaction.
The reaction will be assigned to the action.
Use the Wait For Completion checkbox to determine whether the next action will be called immediately or only after the current action is completed.