The Linked Blender Tip Show How-to Open/Close Toggle the Object Tools Panel in Blender UI 3D Window.
Blender is the Free and Open Source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, even Video Editing and game creation.
Hit the “N” Key on the Keyboard to Toggle the Object Tools Panel in Blender