About Entering System Variables

About Entering System Variables

System variables are settings that control how certain commands work.

Whereas commands usually initiate an activity or open a dialog box, system variables
control the behaviors of commands, default values for operations, or the appearance
of the user interface. They turn on or turn off modes such as Snap, Grid, or Ortho.
They set default scales for hatch patterns. They store information about the current
drawing or program configuration. You can use a system variable to change a setting
or to display the current status. Many system variable settings can also be modified
in a dialog box or on the ribbon.

NOTE: Some system variables accept negative values either to turn off the setting or to
signify a special case. You can examine or change a system variable’s setting transparently,
that is, while using another command; however, new values may not take effect until
the interrupted command ends.

Using Bitcode Variables

Some system variables are controlled using bitcodes. With these system variables, you add values to specify a unique combination of behaviors.
For example, the LOCKUI system variable provides the following bitcode values:

0 Toolbars, panels, and windows not locked
1 Docked toolbars and panels locked
2 Docked or anchored windows locked
4 Floating toolbars and panels locked
8 Floating windows locked

Thus, if LOCKUI is set to 5 ( that is, 1 + 4 = 5), only docked and floating toolbars
are locked. Docked, anchored, and floating windows are not locked.

Displaying a List of System Variables

Like commands, the names of system variables appear in the Suggestion List that is
displayed at the Command prompt as you enter a command. The commands are displayed
first. Press the Tab key to switch to the system variable list. You can set whether
system variables are mixed with commands or not displayed at all in the Input Search
Options dialog box.

The SETVAR command lists all the system variables in the text window or the extended
prompt history. You can use an asterisk (*) as a wildcard to filter the list.

Learning AutoCad

>System variables are settings that control how certain commands work. Whereas commands usually initiate an activity or open a dialog box, system variables …… Tip: You can access any of the above folders by entering the environment variable in the Windows Run box or Windows Search Box.… You can set an environment variable on a Linux, Windows, or Mac platform with the instructions given below. … You can create or change environment variables in the Environment Variables dialog box. … To set an environment variable on Mac OSX, first open a terminal window.system variable can be set using System Utility in control panel on Windows, or in your shell's startup file on Linux and … In a terminal windows, enter:… 2. Select Advanced system settings. 3. In the Advanced tab, select Environment Variables. 4. Select New. 5. You will now be able to enter the …… Creating a new global system variable is quite simple and is one of those … Enter the name of your new variable as well the value and click OK.