You can promote a non-reusable workflow task to a reusable task. Reusable tasks must have unique names within the repository. When you promote a non-reusable task, the repository checks for naming conflicts. If a reusable task with the same name already exists, the repository appends a number to the reusable task name to make it unique. The repository applies the appended name to the checked-out version and to the latest checked-in version of the reusable task.
To promote a non-reusable workflow task:
In the Workflow Designer, double-click the task you want to make reusable.
In the General tab of the Edit Task dialog box, select the Make Reusable option.
When prompted whether you are sure you want to promote the task, click Yes.
The newly promoted task appears in the list of reusable tasks in the Tasks node in the Navigator window.