Unable to Clear Linux Terminal Screen

I’m fairly new to Linux, and I’m having trouble with something that seems pretty basic but is really frustrating. After running several commands in the terminal, the screen gets cluttered, and I want to clear it so I can focus on new outputs. I’ve tried using clear but noticed that it doesn’t erase the previous content — I can still scroll up and see it. Is there a way to fully clear or reset the terminal, so all previous outputs are completely gone, and I start with a fresh screen? Would this depend on the terminal emulator I’m using (like GNOME Terminal or TTY), or is there a more universal command that works across all terminals?