This plugin implements the toolbar for more comfortable post controls. You can enable/disable it from «Screen Options» panel.
Also you can use hotkeys:
- Save/update post — Ctrl + S
- Delete post (move to trash) — Ctrl + D
- Change status of post — Ctrl + 1
- Change visibility of post — Ctrl + 2
- Show revisions — Ctrl + 3
- Change data of post — Ctrl + 4