Clear scroll back buffer in zsh
In bash you can use ctrl + L to clear the scroll back in the terminal. However in zsh, it doesn't work. So here is a workaround. You can use a control sequence to clear it, and set an alias for that.
Open your .zshrc file in the editor.
$ vim ~/.zshrc
And add this to the file.
alias cls='printf "\ec\e[3J"'
Save and reload the terminal: or
$ source ~/.zshrc
Now when you run the command 'cls', it should clear your terminal with its scroll back buffer. Hope it helps.