It used to be that in order to change a Pen, Project, or Collection from public to private (or vise versa), you had to open it directly and edit it there. Now, you can make that change from anywhere you see them in grid, be it in the Your Work section, your profile, or anywhere else you see something you own.
If you have a bunch of things you need to toggle, this should be much faster, particularly in list view.
Privacy is a PRO feature, so if you aren’t PRO, you’ll see a message like this: