This section needs a complete refactor. We propose to do what follows:

• move the most generic topics to the Vitals sections (which could be renamed Basics)
  • viewport related info, such as manipulators
  • numeric input
  • transform properties, etc

• rename the section to 3D Viewport, it should contain only
  • layers
  • ruler and protractor

• move other content to specific section
  • the Mirror, To Sphere and Shear tool can go to the modeling section
  • Grease pencil could have its own subsection

This is just stub, try to move the other unmentioned subsections accordingly.