The purpose of the functions in this menu is to control what does and doesn't appear in the editor's 3D and 2D views. For more ways to customize the appearance of the Valve Hammer Editor, refer to the sections on the General, 3D View, and 2D Views options.
Screen Elements
This sub-menu allows you to show
and hide Hammer's toolbars.
2D X/Y, Y/Z, X/Z
Selecting any of these will turn
the currently selected view into whatever you've selected: X/Y (top),
Y/Z (front), or X/Z (side) view.
3D Wireframe, Filled Polygons,
Textured Polygons
Selecting any of these will turn
the currently selected view into wireframe, filled polygons (flat
shaded colored polygons), or textured polygons (textured as they
would be in the game).
Autosize 4 Views
This function only works when you aren't using
independent windows. The four views will be set to equal sizes based
on the current available screen space.
Center Views on Selection
Choosing this
function will center all of the 2D views on whatever you currently
have selected.
Show Connections
Choosing this
function will cause lines to be drawn in the 2D views between
entities and their targets.
Hide Items and
Hide Paths
These
functions are used to hide items (any point entity, actually) and
paths (which are created with the path tool).
Hide Selected Objects
This function
is to hide the currently selected object. Doing this also places the
object into a VisGroup
which can then be shown or hidden using the Filter
Control dialog.
Show Selected Objects
This function
makes all hidden objects visible.