Understanding system variables and settings:
AutoCAD uses several hundred system variables to store and manage the current working environment; for example when the command LAYER is used to set a layer to be current the AutoCAD system variable CLAYER is set to that layer. The value of CLAYER is used as the default layer until changed. CLAYER is also the name of a separate command. Enter the command CLAYER at the command prompt and you will be prompted for a new layer name. Most AutoCAD system variables can be directly controlled by using the variable name as a command word.
AutoCAD system variables can be set either by using the related command e.g. "clayer" (Current Layer) LAYER New or Set will change the current layer or the command CLAYER will set the current layer or by using Autolisp (setvar "clayer" ?)
MYCADKEYS uses AutoCAD system variables to control the drawing environment and also maintains its own collection of custom MYCADKEYS variables to store settings specific to some MYCADKEYS commands. Typical of these is a variable that stores the value of MYCADLAYERS' current layer length i.e.OFF, 5 or 12 characters.
MYCADKEYS provides aliases for AutoCAD’s system variables and many of MYCADKEYS' command settings. These are distinguished by prefixing the regular command acronym with an equals sign “=”. (set the vale = to something).
MYCADKEYS aliases for generic AutoCAD variables are usually two characters preceded by the “=” e.g. =GM GRIDMODE whereas MYCADKEYS versions use single characters e.g. =G. Many MYCADKEYS single character commands are customized to cycle through predetermined selected values e.g. 1, 2, 3, 4. Occasionally where an MYCADKEYS version is not available the single character shortcut will start AutoCAD’s standard system variable command.
MYCADKEYS provides a global command “=” for setting variables.
Command: = <enter>.
The following prompt is then presented:
Press the relevant capitalized character.
Refer to SYSVARS.XLS for a full list of variables.
MYCADKEYS shortcuts for some common variables:
In the list below command names in CAPITALS indicates the generic AutoCAD command.
= MYCADKEYS settings
=A MYCADKEYS Aperture
=AP AutoCAD APERTURE
=B MYCADKEYS Blipmode
=BM AutoCAD BLIPMODE
=P MYCADKEYS Pickbox
=PB AutoCAD PICKBOX
=DR Dim Rotation (not yet implemented)
=D% AutoCAD DIMSCALE
=D$ AutoCAD DIMSTYLE
=E AutoCAD ELEVATION
=F Field (refer to MYCADLAYERS)
=FI view ID
=N AutoCAD SNAP command
=OM AutoCAD Osmode
=O Offset distance (not yet implemented)
=R Rotation (error)
=S . . . Select (DDSELECT, pickfirst & pickstyle) (not yet implemented)
=$ AutoCAD STYLE
=T MYCADKEYS Text settings
=TS AutoCAD TEXTSIZE
=T$ MYCADKEYS $tyle
=TP Plotted size
=T.<< pick to copy (error)
=T.>> pick to show (error)
=V set AutoCAD or MYCADKEYS variables
=VP Personal user variables.???
=VS reload standard MYCADKEYS user variables ???
=W AutoCAD PLINEWID
=PW AutoCAD PLINEWID
=ON Osnap (avoid using)