Set the Window Size of a Subview or Subform

You can set the height and width properties of a subform using the Open a subform rule action. In the same respect, you can set the height and width properties of a subview using the Open a subview rule action. Both actions are available when configuring form rules (they are not applicable at the view rule level).

Example: When you double-click a row on the parent form, the subform opens. In the image below, the subform's title, height, and width are set by configuring the Open a subform rule action.
SubForm and Views

Try it yourself!