You can update your details within Perspective using one of two ways (or both, if you fancy doing it twice).
The first method is to click on the Edit Details option on the Homepage, shown in the video below.
The second method is via the Settings > Account Settings page, accessible by clicking the Cog icon
In either case, once you land on the Personal Details page, you can update your information by amending the fields, then clicking Save Personal Details.
Please note that if you change your email address, you may be required to verify it again.