Creating Parameters Explicitly
You can also create new parameters directly by adding entries to the parameter definition table. Parameters that you create this way are not automatically assigned to constraints on your part. For this reason, explicit creation is often used to create parameters that will be used only to supply constants, sub-expressions, or other values that have no relationship to the part.
To explicitly create a parameter, bring up the parameter definition table by clicking Advanced in the Current Constraints dialog box. The parameter definition table provides the following buttons for the creation of new parameters:
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Command
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Action
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Length
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Create a new length parameter
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Angle
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Create a new angle parameter
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Point
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Create a new point parameter
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User
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Create a new user (unitless) parameter
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Each of these commands adds a new parameter to the table. These parameters are not associated with constraints, but you can name and define them like any other parameter. The new parameters can be referenced in other expressions and can reference other parameters in their own expressions. Once defined, you may use them for reference or assign them to constraints in your part. To create a new parameter:
1. Click the applicable button, for example: Angle.
2. Enter a name for the new parameter, e.g.: 'Angle_4'.
The name you give must be a suitable parameter label as described in
Assigning Parameters. An explicitly created parameter is given an initial value of 0 and a value type of "unknown." Its value remains unknown until you assign it a value or until you assign it to a drawing element.