How do I insert a pause into the g code?

How can I enter a pause into g code for a bit change? I assume I would create the g code, open it in a editor like ncviewer and enter in a line of code but what do I enter?

This comes from me creating a project in carbide create that involves three different bits but it doesnt automatically put a pause in the code. Not sure how they expect someone to change bits. I did a project successfully by watching and manually pausing at the right moments but that definitely isnt a good way to do it.

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M6 or M06

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Nice thanks!

to change bits, you use the T code to change the tool number. It will stop, tell
you to change the bit, and then continue.

David Lang