The View Menu is a drop down box located on the Control Bar in the Hammer Editor. It contains adjustable settings for the four viewports, offering you a variety of ways to edit your map. The Map Menu is one of the more useful menus in the Control Bar, since it defines how you edit the map, something you'll want to customize for yourself.

Screen Elements

Autosize 4 Views

2D X/Y

2D Y/Z

2D X/Z

3D Wireframe

3D Filled Polygons

3D Textured Polygons

3D Shaded Textured Polygons

3D Lighting Preview

3D Ray-traced Preview

Center Views on Selection

Center 3D Views on Selection

Go to Coordinates...

Go to Brush Number...

Show Connections

Show Helpers

Show Models in 2D

Hide Items

Hide Entity Names

Use Radius Culling

QuickHide Objects

QuickHide Unselected Objects

Unhide QuickHide Objects

Convert QuickHide Objects to Visgroup

Move Selection to Visgroup

Draw Materials Opaque

HDR