Tired to scroll down to edit a custom field or a SEO meta data at the bottom of the editor!
Postbox to Tab convert the list of postboxes into a tabbed menu which gives you a global view of all available postboxes.
The postboxes in normal zone (under the body) are displayed in tabs.
The postboxes in the three zones (normal, advanced and side) are displayed in tabs.
Comparison when plugin enabled an not enabled.
Plugin options, possibility to enable it, or not, for each post types (including custom post types) and for each postbox zone.