# Tightening program library - Distribution and Update

The global tightening program distribution list is like a subscription list. Whenever a change is made to a global tightening program, the change is propagated to all subscribers. The distribution list manages the subscription.

## Distribution

1. Select Library in the left-side menu bar.

2. Go to Tightening Program .

   The workspace area shows a list of Global tightening programs.

3. Select one or more check box in the Global tightening program library to view the content of the distribution list.

   The distribution list shows all controllers that subscribe to the selected tightening programs.

## Update

When a distributed program is changed, the change is distributed automatically to the plant structure expect for approved programs.

Approved programs must be set to Draft state to be changed. Changes done in a program set to draft is stored in the library but not updated in the plant structure. The change will be distributed to the plant structure when the program is set to approved.