1. Mouse Scroll - Zoom In / out. 

2. Scroll Button - Move Screen. 

3. Zoom - Scrolling Mouse (Select object) . 

4. Scroll - ctrl + Scroll (fast Scrolling) 

Scroll Bar  > Right Click (For Minimum Property)

5. Customize 

Unit setup 

US Standard 

Default units - Inches

Ok. 

6. Create : 

Geometry 

Standard primitives

Object Types - 

Box 

Create (Box) -

Set- 

Length

width 

Height

Length Segment 

Width Segment

Height Segment 

Ok.