Variables Tab
Use the Variables page of a task's properties if you want to override values for variables in the related workflow.
If variables have been defined for a workflow task, they are displayed here. You can modify their values; this changes the variable values when the task is executed in this particular workflow. It does not affect the object definition.
Adding or deleting variables is not possible here. You do it in the object definition.
For information about defining variables, see Variables & Prompts Pages.