How to press <F15> key in mcedit, if my keyboard only has F1...F12?

I use mcedit (part of GNU Midnight Commander) to edit text files in Linux. It has a hotkey for "Insert file..." - F15 (the same as F9 -> **F**ile -> Enter -> **I**nsert file). But my keyboard doesn't have F15 button, there are only F1...F12. How can I press **F15** button which isn't there? *I use Ubuntu 22.04 with bash 5.1 and mc 4.8, running on wsl2, Windows terminal 1.21.10351.0.*