Xcode is one of the few IDE's I know that does not have a "Open terminal" button. But you can leverage so called "Xcode Behaviors" to quickly launch your terminal.

Xcode Behaviors allows you to execute shell scripts from Xcode with a keyboard shortcut.

There is a nice selection of useful scripts on GitHub and the repo of Awesome-Xcode-Behaviors explains well on how to setup Xcode Behaviors with these scripts.

I use iTerm2 as a replacement for Terminal so I can use the open-iterm.sh script that I downloaded from GitHub.

With a custom shortcut I can easily open the terminal now.

Xcode behaviors can be further used to speed up your workflow, e.g.

• Open the Issue Navigator for build failures
• Open the Test Navigator for test failures
• Start debugging in a new tab

If you are interested in more information then read Speed up things with Xcode behaviors by Antoine van der Lee.