It's always easier when things are organised, and putting a name to your design is part of it!
There are couple places in Studio you can edit your design name from.
Name your design from your design page
From your design page side panel, you’ll see on the top left corner of your screen a small icon ✎ .
Click on its title
Type the title you want to use.
Hit enter or return on your keyboard to finish.
Rename designs from your dashboard
From the dashboard, click on My Design.
Select the design that you want to rename, click on edit, and find the ✎ icon on the top left corner of your screen.
Type the title you want to use.
Hit enter or return on your keyboard to finish.