How to turn off this part of the core GUI?

Okay, so since I have started scripting, this one thing irritates me. It is this bar right here . I don't know how to turn it off, any ideas of how to turn it off?

What you're aiming to do is "remove" the topbar, you can do this by making the topbar opaque in the following way:

PlayerGui:SetTopbarTransparency()

As explained on the wiki, you can use the PlayerGui:SetTopbarTransparency(float transparency) method to - self explanatory - set the topbar's transparency. The wiki explains the same:

SetTopbarTransparency sets the transparency of the Topbar CoreGui. A value of 0 is completely opaque, and a value of 1 is completely transparent

The script

-- In a local script placed in StarterPlayerScripts
local client = game:GetService("Players").LocalPlayer
local playerGui = client.PlayerGui

local function toggleTransparency()
	local current = playerGui:GetTopbarTransparency()
	playerUI:SetTopbarTransparency(current >= 0.5 and 0.5 or 0)
end

-- At whatever point you need to toggle the transparency
toggleTransparency()

Please comment if you have any questions or I have made a mistake

Those parts of the game are part of a StarterGui:SetCore. You can read about it here (https://developer.roblox.com/api-reference/function/StarterGui/SetCore). For your problem. You would need to reference the starter gui and use :SetCore to access core scripts. In your case you would want to remove the top bar. In the first arguement, write a string with what type of CS you want tp edit ("TopbarEnabled"), then use the other arguements to edit which core script you are editing.

game.StarterGui:SetCore("TopbarEnabled",false) --boolean value

``

I got it:

go onto your ScreenGUI and enable "IgnoreGuiInset".