Hi all,
I am new to the program. I am a full-time trader and I want to work on a dark background as much as I can. Because of the type of program I am running, I do not want to apply the setting to all of them, I just need this program to work on one application. I have the screenshots below as well but it looks like is not doing anything. Please help if you can.


And this the program I need it to make the background dark:

I am trying to make everything to blend in:

Any help will me appreciate a lot.
I tried everything that I could.
Thank you