Button with the assigned action allows you to start a previously created application from the application in which it was created. The application which will be launched in this way can pick up the parameter by calling formula =input(parameter_name) after earlier adding an input parameter of the same name.
To add action to the button, select it on the application designer (1), go to the options of the widget, and then add the action by using add action button(2). Selecting the type of an action is possible by clicking on the drop-down list (3). Complete the data required to run an external application parameter (4), ie. the application name, the name of the parameter defined in the target application and the value you want to pass it.
When a user clicks the button, the target application will start with the defined parameter in action.