The program is intended for intraoperative and extraoperative demonstration of testing material (images) with individual settings. For the initial demonstration before testing, a collection of images with a unique name is created, the demonstration time is set. An individual set of images is then created for each patient. The program allows exclusion of unsuccessfully named images during the initial demonstration of a universal set. For repeated studies, the edited set of images is shown in random order. The app doesnt contain personal information. App tutorial:https://youtu.be/9VktclXxgNE