Abstract: A method for controlling an external device (6-8, 10) having a wireless communication function (6a-8a, 10a), in which an application is executed on a mobile digital terminal (1), in particular a tablet or smartphone, and sequentially outputs digital content which changes over time by an output unit of the terminal (1), which content, in addition to the data (2a) to be output, contains a number of embedded or linked control commands which are sequentially executed by a respectively associated module (1a, 1e) of the mobile digital terminal when sequentially displaying the content in accordance with flow control (1c) of the mobile digital terminal (1), and in which, when at least one particular control command from the number of control commands is reached, a wireless communication module (1e) of the mobile digital terminal (1) is used to wirelessly control the external device (6-8, 10) in order to cause a function of the external device (6-8, 10) in a substantially synchronous manner with the display of the con

Abstract: A method for controlling an external device (6-8, 10) having a wireless communication function (6a-8a, 10a), in which an application is executed on a mobile digital terminal (1), in particular a tablet or smartphone, and sequentially outputs digital content which changes over time by an output unit of the terminal (1), which content, in addition to the data (2a) to be output, contains a number of embedded or linked control commands which are sequentially executed by a respectively associated module (1a, 1e) of the mobile digital terminal when sequentially displaying the content in accordance with flow control (1c) of the mobile digital terminal (1), and in which, when at least one particular control command from the number of control commands is reached, a wireless communication module (1e) of the mobile digital terminal (1) is used to wirelessly control the external device (6-8, 10) in order to cause a function of the external device (6-8, 10) in a substantially synchronous manner with the display of the con

Abstract: New uses of smartphones (1, 1?) and comparable mobile digital terminal devices are proposed. This includes uses of a digital terminal device, preferably in the form of a mobile device such as a smartphone or the like, wherein special application software (App) is stored and run on the terminal device and wherein the terminal device (1) is advantageously used together with a holding device (2) arranged or to be arranged on the head of a user (5), particularly in accordance with EP 2 103 862 or EP 2 562 462 or US 2012/0175394 or DE 20 2009 009 326 or DE 24 20 2013 000 740, so that the hands (6) of the user (5) are free and thus additional application possibilities arise during the use of the terminal device (1), for example by using an external controller.