How to implement this in the admin panel?

Question

1C-Bitrix

Tell me which direction to go. It is necessary that a button appear in the main menu of the administrative panel, when clicked, it would open its own page (still in the administrative panel), where its code would be executed. Specifically, orders would be displayed according to a certain condition and given the opportunity to change some parameters. You need to do it on a separate page, the standard order output page is not suitable.