The VB Editor has four main parts:

• Toolbar / Menu area
• Project explorer pane
• Properties pane
• Code window (not shown yet)

You can adjust the relative size of the panes by moving your cursor over one of the borders, clicking and dragging. 

You can also close any pane. The View menu command will let you get them back.

The different panes / windows can also be re-arranged by dragging them by the title bar.