How do I make the eight notes separated?

[tonton5]

How do I make the eight notes separated ? Don’t be in a group
thank you all very much~

[arco]

You should be able to click on the stem of the D and Eb, this will select both noteheads, then right-click, Beaming>Split beam.
Is this what you wanted to do?

[Vadian]

Locally: As mentioned by @arco.

Globally: In Notation Options > Beam Grouping > Beams and Rests