You can define bounding boxes for every element separately or in the plugin options which will apply the bounding box to multiple elements.

How to define a bounding box

The bounding box property accepts 3 different values.

Boolean: falseDefault value. No bounding box.
Object: {width: 100, height: 200, y: 20: x: 50} An object defining a custom bounding box by setting size and position of the bounding box.
String: "ANOTHER_ELEMENT_TITLE"The title of another element in the same view. This size and position of this element will be used as bounding box.