Sign in to your Store Editor.
If you want to change the information in an existing section or item page, go to the specific page and click "Edit."
For example, to modify an item, first click the navigation button that leads to your section, then click the link to your item.
In the toolbar at the bottom of the page, you'll see a button labeled "Edit." Click "Edit," and you'll see the fields you filled initially to create the Item page. If you want to change information on this Item page, just edit the text in the field you wish to change, then click "Update."
To view the definitions of each field, click the "Help" button found at the top on the Edit page.