Method for extending the operating functionality of a field device (FG) of the automation technology from one operating device (BG1) to at least one other Control unit (BG2), comprising - Establishing a wireless communication link between the operating device (BG1) and the field device (FG) via a first communication interface (KS1) of the operating device (BG1), wherein the Operating device (BG1) at least one operating program with a large number of display elements (AE1, AE2) and operating functions (BF), via which the field device (FG) is operated; - Initiate a search for objects in the surrounding area and the control unit (BG1) via the first control unit (BG1). communication interface (KS1) or a second Communication interface (KS2); - In the event that at least one further operating device (BG2), which is assigned to the operating device (BG1) has been found, setting up a wireless Communication connection between the operating device (BG1) and the additional operating device (BG2) via the first communication interface (KS1), or the second communication interface (KS2), whereby on the another operating device (BG2) runs another operating program; - Transfer of at least one part of the display elements (AE1, AE2) and/or operating functions (BF) to the other operating program of the additional operating device (BG2); and - Operating the field device (FG) using the additional operating device (BG2) via the display elements transferred to the other operating program (AE1, AE2) or operating functions (BF), wherein, in the event that at least one further operating device (BG2) not known to the operating device (BG1) is found, the operating device (BG1) sends a Suitability test of the additional operating device (BG2) is carried out, whereby the suitability test checks which of the display elements (AE1, AE2) or the operating functions (BF) can be transferred to the additional operating device (BG2). - Establishing a wireless communication link between the operating device (BG1) and the field device (FG) via a first communication interface (KS1) of the operating device (BG1), wherein the Operating device (BG1) at least one operating program with a large number of display elements (AE1, AE2) and operating functions (BF), via which the field device (FG) is operated; - Initiate a search for objects in the surrounding area and the control unit (BG1) via the first control unit (BG1). communication interface (KS1) or a second Communication interface (KS2); - In the event that at least one further operating device (BG2), which is assigned to the operating device (BG1) has been found, setting up a wireless Communication connection between the operating device (BG1) and the additional operating device (BG2) via the first communication interface (KS1), or the second communication interface (KS2), whereby on the another operating device (BG2) runs another operating program; - Transfer of at least one part of the display elements (AE1, AE2) and/or operating functions (BF) to the other operating program of the additional operating device (BG2); and - Operating the field device (FG) using the additional operating device (BG2) via the display elements transferred to the other operating program (AE1, AE2) or operating functions (BF), <EOS>