exteneded sustain articulation for guitar

Hello Musescorers:

I'm using the most recent version of musescore for linux: MuseScore-Studio-4.4.3.242971445-x86_64

I looked for the sustained articulation for guitar ( frown with a dot beneath it as shown in the attachement ) and can't find it.

How do I notate a sustain, as is often used on the last chord or note of a tune?

Thanks,
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