How do I access Preview Generator for a single document?

How do I access Preview Generator for a single document?
1. Login to your account using the username and password provided.
2. Hover over the Fleet Management tab and click on Engine Centre option.
3. Click on Engine Module Fleet tab.
4. Select the asset from the grid.
5. Hover over the Maintenance Status button and Click on the Engine Module History button. It will open new window. NOTE: The Maintenance Status button will become active once an engine record has been selected.
6. Select Year View, BOX View, MCC View or Delivery Bible View.
8. Click on the Open Folder. It will open a new window.
9. Go to document for which you want to change Preview and Click on Preview icon. It will generate Preview into new window.
10. It will show you different preview images. Select image that you want to put as a Preview.
11. Click on SAVE button to save your Preview.
12. It will give you pop up message of "Preview image saved successfully".