How can I resize the screen?

Hello. I am new here and I am glad to find this excellent video editor in Linux.
I am using Qt 5.6.1 version.
I try different layout and I am not really satisfied any of them.
The default layout hides the playlist adn makes the screen too small.
The playlist project hides the timeline.
How can I see a bigger screen, playlist and timeline together?

Click buttons or menu items in the View menu to open panels. The layout is saved automatically when the program exits successfully for the next session.