In custom Sage X3 development, we frequently use parameters for the use of constant values. Here we have an option to control the visibility of parameter on Parameter Value screen.
1. Navigate to : Development>Data and parameters>Development setup>Parameter definitions

Parameter definitions
2. Check the Changeable checkbox and click on save button.
3. Now navigate to : Setup > General parameters > Parameter values.
4. You will see the “TEST3” parameter will appear on parameters values screen.

TEST3 parameter
5. Similarly, if you want to remove the parameters uncheck the changeable checkbox and click on save button.
Hope this helps.
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