In the Block Editor, the Parameters Manager displays a consolidated view of all parameters
and user-defined properties for the block definition.

Create a Dimensional Variable

To create a dimensional variable, you apply a dimensional constraint to an object
in the Block Editor. Dimensional variables are displayed under the Dimensional Constraint
Parameters group header in the Parameters Manager palette. (Not available in AutoCAD
LT)

User variables are custom variables that create and drive object relationships. These
variables can contain constants, or equations.

Click the New User Parameter icon on the Parameters Manager palette to create a user
variable. Alternatively, double-click an empty cell to create a user-defined variable.

User variables have the following characteristics:

• Default values are: Name = user1, Expression = 1, and value = 1.00.
• Name should be alphanumeric.
• Expression values should be within the range of -1e100 and 1e100.

Edit a Dimensional Variable

You can edit the dimensional variable name and expression. To do so:

• Double-click the name or expression box.
• Select the row and press F2. Press the Tab key to edit the contiguous columns.

  You cannot edit the Value column.

When you rename a dimensional variable, all instances of the variable are updated
in the drawing and in the Parameters Manager palette.

Invalid expressions are displayed in red text.

Delete a Dimensional Variable

The following are the current behavioral changes in the drawing when you delete a
dimension variable:

• The associated dimensional constraint in the drawing is removed.
• The variables retain the value calculated by the expression as a constant. This action
  is for variables referenced by other variables, and ensures that the geometry does
  not change.

Filtering the Display of Variables

You can filter the display of variables to do the following:

• Display All Parameters — Displays all associative variables. No filter is applied.
• Display Parameters Used in Expressions – Displays all variables that contain expressions
  to evaluate a value, and variables contained in expressions.

Sorting a Column

The sort order is not affected when you change a cell value.

Searching a Parameter

An edit box in the upper-right corner of the Parameters Manager allows you to search
for parameters by name.

Shortcut Menu Options

The following options are displayed on the shortcut menus in the Parameters Manager
palette. (Not available in AutoCAD LT)