ZSH iterm2 increase number of lines history

It’s not immediately obvious in the iTerm2 documentation on how to change it.

• open the iTerm2 preferences ⌘ + ,
• select the Profiles tab
• then select the Terminal subtab
• Beware, changes to the Scrollback lines value take effect immediately so check Unlimited scrollback now if you don’t want to delete your current buffer(s)
• change the value of the Scrollback Lines to whatever you’d like
• Uncheck the Unlimited scrollback option if you’d like to use your Scrollback lines value