Uncomment HTML what does it mean:Be sure to delete all trailing comment tags, i.e. -->

[hbar1st]

@hbar1st

To uncomment you do the reverse. Remove <!—and —>.

I already explained in the above comment how to uncomment.
You just remove the same characters you added earlier.
So if you have

<!-- <p>hello</p> -->

you just delete those chars so you end up with

<p>hello</p>