When enabled, points are converted to mesh vertices and PCV draws original points over vertices.
You can use edit vertices with Blender tools.
To update edits in points, click Update.
To finish click End.
Edit mode includes subset of display options, selection operators that select mesh vertices based on points color or scalar value, operators that set color or value and operator to flip point normal (not mesh vertex normal, those are ignored).
While you can create new mesh vertices and they will be added to points, it is better to duplicate and move existing so all colors/normals/scalars are already set.
