WordPress.com has a new action bar, which makes it easier for readers to follow blogs of interest and for bloggers to make changes to their own sites.
If you're a blog visitor, and you're on a WordPress.com blog that you're not yet following, you can click the "Follow" button that appears in the bottom-right hand corner so new posts from that blog will appear in your WordPress.com Reader. If you click on the three dots that appear on the button, you'll get more options such as the ability to add the blog's theme to your own blog, copy the shortlink, report the content, or manage the sites that you follow.
If you're on one of your own pages, you'll have "Customize" and "Edit" options. You can use these to go to the customizer where you can adjust your site's appearance, change themes, change settings, etc, or go to Edit to make changes to your actual content.
The action bar will appear on the desktop, tablets, and smartphones. You can minimize it if you don't like it.
Images via WordPress.com