How to maximize the widget after a trigger
Just add the center portion of the code below (lines 4-7) to your widget code before the end of the script as shown.
To find your Widget Code, see this article: Where can I find the property and widget IDs?
Implementing this code will mean that each time a trigger is sent the widget will try to maximize. This means that if the visitor minimises the chat and another trigger is sent afterwards, the widget will maximize once again.