Step 1 – Make sure the page you want to leave a comment for actually has the “Add Comment” button. If it does, then click it!
If it doesn’t then contact the owner of the page and ask the owner to enter the page and activate comments. Comments are deactivated after two months of inactivity.
Step 2 – You will be redirected to another page in which you will see a little text area and 2 buttons.
Step 3 – In the text area type your comment. If you try to send a blank comment you will get an alert saying you can’t do so.
Step 4 – Once you are done typing your comment in, press the “Add Comment” button.
You will have to wait until a project moderator approves it so it is available for public view! The project moderator is the page’s owner too.