How to "collapse" a console application?

Question

Qt

There is a Qt console application running on Ubuntu Server, how can I go to the console to execute some command without closing the application, and then return to the already running application and continue working with it (executing application commands)? Those. without closing the server application, work also with the console.

Answer 1

CTRL-Z
then bg
do things
fg

Answer 2

Discover screen