Abstract: Methods and apparatuses are disclosed for triggering a back-of-the-hand-worn electronic device (such as a scanner) via a trigger button toward the end of a removable flexible trigger button assembly or arm that is left/right-handed reversable in accordance with the preference of the user. The flexible trigger button assembly has at least a portion that is user bendable and twistable over a wide range to a desired user-customized static configuration for optimal ergonomic placement of a trigger button relative to the user's thumb. In a second embodiment, the flexible trigger button assembly instead has a simple cable terminating in a trigger button ring assembly that can be secured on the user's forefinger. Both embodiments allow each user to press the trigger button more easily, comfortably, and repeatedly.