You can change the name of an Item once it's been created. You can do this either in bulk from the Content tab, or individually for an Item from within the Item editor.
Here's how you can do this from the Content tab:
1. Head to the Content tab
2. Select Re-order Items
3. Click and update Item names
Update all the Item names you need to make changes to.
4. Save changes
All changes will be applied straight away.
Here’s how you can rename a single Item when working on the content:
1. Click on the Item name
When you're in the Item just click on the name.
2. Rename Item and save changes
The changes will be immediately reflected on the Item.