The title bar of gnome-terminal is too much in heighth and occupies too much space. Is there any way to adjust it smaller?
Did you change the font size ?
Yes, I changed. But the title bar is too thick relative to the menu bar.
You probably want to install gnome-tweaks and change the theme (gnome-shell and application) from adwaita to something else.
edit: you will probably also need
Can you show a screenshot and tell us the changes you made with the appropriate magnitude so we can test it and see if there is any bug.