Move Skype to the main screen - how to?

[jobtmp]

Setup: 2 screens on my notebook - primary (main) and secondary (TV) connected via HDMI (PC in 2 screen mode). Ubuntu 17.10 and Skype (unknown version, presumably the latest).

Problem: Skype window launches in the secondary window (TV) only.

Q: How to switch Skype to the main screen?

[deadflowr]

Does the move windows keyboard shortcuts work?
(I forget what hey are, I think something like shift ctrl + arrow key to move winodws from monitor to monitor.
But it might be something else,)
It should be listed in the keyboard shortcuts in settings > keyboard.
(It might be listed as screen)

Edit: oh it seems like it should be shift + super + arrow key to move from monitor to monitor.
But you can double check at the settings page.

[jobtmp]

TY for the answer.

Yes, I' ve found the hotkeys descriptions and have some of them tried but to no avail. Probably I need more info on the multi-monitor concept in general.