How to edit posts, comments, and answers that have already been verified?

Question

I literally explained the whole question in the title.

Answer 1

The posts need to be on the same device as the one you posted on.

But....

The pencil button edits and the lightbulb hides it.

Comments

I am not sure I understand the first answer...

And the second answer is before it gets verified..

Can you better explain the first one?

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I mean to edit, you have to edit on the same device you posted on.

No, it's the same.

I tried xp

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What do you have to press,because I do this all on tablet.

And I mean to edit posts and answers.