Scenario
User would like to have Allocated Supply saved search from their Sales Order.
Solution
Please follow the steps below:
1. Open a Sales Order, click the value for Allocated Supply. Click Customise View button on the pop-up window.
2. Replace the search title according to your preference. 
3. As a sample, I'll be renaming it as Allocated Supply Search (DC) then click SAVE button.
4. You can now see this on the dropdown:
5. Search this view by typing the search title on your global search, then click Edit when you hover your mouse on the first result:
6. Here is the saved search setup:
7. You can click Save & Run or Preview to run the search:
8. Sample results, this provide you all the allocated supply for your items, this also uses the same setup as for the pop-up window: