I don't think there's an easy way to do so. You could instal sudo apt install systemsettings
and look around.

Hello! The top bar you are referring to is the menu bar of the program. Depending on the operating system and the program you are using, the steps to hide it may vary. However, here are some general steps you can try:
Check if the program has an option to hide the menu bar in its settings or preferences. Look for an option like "Fullscreen mode" or "Hide menu bar."
On a Mac, you can try pressing the "Ctrl" + "Command" + "F" keys to toggle the full-screen mode of the program, which will hide the menu bar.
On Windows, you can try pressing the "F11" key to toggle the full-screen mode of the program, which will hide the menu bar.
If none of the above options work, you can try using a third-party tool like AutoHotkey (Windows) or Hammerspoon (Mac) to automate the process of hiding the menu bar. However, this requires some knowledge of scripting and programming.
Please note that hiding the menu bar may affect the functionality of the program, as some features may only be accessible from the menu bar.

hello every body.
I dont like this white or black top bar in my programs (see the screeen shot) how can i remove this?