There are two ways to link a request: Link by Request or Link by Number.
Link by Request
Right-click in the grid and select Link to Existing Request. A list of available Requests will appear.
Select any Request from this list. That Request will then be 'linked' to the current Request.
Link by Number
Right-click in the grid and select Link to Request by Number. The followingdialog window will appear prompting you to enter the number of the Request you wish to link to.
Enter an existing request number.
Click . That Request will then be 'linked' to the current Request.