Log into the NoteVault website.

Find the note you wish to comment on.

Hover your mouse over the text of the note, and a comment button will appear.

Click on "Comment."

Type your comment.

Click the blue "Add" button when you are done.

Log into the NoteVault Notes! app.

Select the project you wish to enter.

Find the note you wish to comment on.

Tap on the "Comments" button (located on the bottom of the note).

Type your comment.

Click the "Add" button when you are done.