On the page you want to bookmark, do a right click in an empty area of the page. At the top of the menu, press the Star. Hot key; <Control>
(Mac: <Command>) D.

Or, Press the bookmarks Star on the toolbar. This will place a bookmark in the Unsorted Bookmarks Folder. To edit that bookmark, press the Star again.

A window will come up with the name of the page and its web address. You can edit these entries.

Next, select what bookmarks folder you want this bookmark in. If you do not see that folder, go to the far right of the Folder line, and press the down arrow.

when I press the down arrow I only see five of the nine folders. That's my problem I can only see a few of my folders.

Click the arrow at the far right (outside) of the folder field (i.e. not the arrow in the folder field, but the one further to the right) in the "Edit This Bookmark" window to access the complete folder list. The full folder list also opens if you click the drop marker in the Folder field and click the "Choose..." item. The full folder window has a button to create a "New Folder" (look for a button with "New Folder" or a "+" under the folder list).

If folders in the full folder list aren't expanded (i.e. are closed) then look for a, possibly faint, arrow icon to expand (open) the folders.

Thanks, The plus in the folder box expanded the view so that I can now see all my folders. Thanks so much for solving this for me. I hope others with this problem will find the solution here.