CECOLOR

In Release 10, this string contained "BYLAYER," "BYBLOCK," a color number (for example, "15"), or a standard color number and name (as in "1 (red)"). The last form has been dropped, so applications no longer need to cope with its embedded blank. The standard colors now appear simply as "1" - "7"

DIMxxx

DIMBLK, DIMBLK1 and DIMBLK2 are now used for angular dimensions. DIMTIX and DIMTOFL control the style of Radius or Diameter dimension created. DIMSCALE can now be set to 0 to invoke paper space scaling

ELEVATION

Sets the 3D elevation, relative to the current UCS, for the current space (paper or model)

EXPERT

If set to 5, now suppresses additional prompts

EXTMAX/EXTMIN

Drawing extents expressed in 3D World coordinates for the current space

FLATLAND

Can be read, but can be set only to 0. It is forced to 0 when an existing drawing is read in

LASTANGLE

Point is expressed for the current space

LASTPOINT

Point is expressed for the current space

LASTPT3D

Discontinued feature. Use LASTPOINT instead

LIMCHECK

Status reported or set for the current space

LIMMAX/LIMMIN

Drawing limits expressed in 2D World coordinates for the current space

OSMODE

Running Osnap modes are now ignored during entity selection

PLATFORM

Indicates which version of AutoCAD is in use

UCSFOLLOW

Ignored while in paper space (always in plan view)

UCSNAME/UCSORG/UCSXDIR/UCSYDIR

Always reported and set for the current space

VPOINTX/VPOINTY/VPOINTZ

Discontinued. Use VIEWDIR (a 3D point)