This setting only applies when the menubar is enabled, or when Terminal is started from the command line and neither the --tab nor the --window options are passed.
You can choose whether to open a new tab or a new Terminal window when you use New Terminal.
Select Edit ▸ Preferences ▸ General.
Set Open new terminals in: to Tab or Window.
Press the menu button in the top-right corner of the window and select Preferences.
In the sidebar, select General.
Set Open new terminals in: to Tab or Window.
Once you have set the preference, you can use Ctrl to invert the preference. For example, if you have your preferences set to open a new terminal in a new tab, then pressing New Terminal will open a new tab. On the other hand, if you hold down Ctrl and then press New Terminal, then a new window will be opened instead.
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