How do I edit an item's volumes?
Click the 'Manage Inventory' link under the 'Inventory' heading in the control panel menu.

Step Two: Find the item you wish to edit
Use 'Find by ID' or 'Keyword Search' textbox to find the Item. (Or you can use 'filter' icon next to keyword search textbox for 'Advanced Search')

Click the 'Edit' button at the end of your item to open it's settings page.

Step Four: Make the updates
On the 'DETAILS' tab, edit your item's volumes in the 'Volumes' textbox. You can either enter value or click on up/down arrows inside to increase/decrease volumes.
Step Five: Don't forget to save
When you are finished editing your item, be sure to click the 'SAVE' button to finalize.
