auto-period added to the end of a phrase

[seidel 1]

When I type a phrase in a note using the Mac desktop client, a period is automatically added to the end if I type two spaces. I can't figure out how to turn this off. I want to be able to edit plain text without auto insertion of periods, but don't see any option for not automatically adding punctuation.

Anyone know if turning off auto-punctuation or autoformatting options is possible?

[kkarney 121]

That doesn't seem to happen to me... (On Mac desktop v10.78.2)

[PinkElephant 8,274]

This is a MacOS function, has nothing to do with EN:

Open MacOS settings (pictures taken with Sonoma), choose keyboard (1), then Text Input, Sources, Edit (2):

 

This toggle (3) turn the conversion on and off:

 

[seidel 1]

Wow! Thanks @PinkElephant! I never would have guessed that the OS would auto-add characters in a text editor for a third party application. I was able to disable it using your instructions. Thanks for helping me.