On the Website:
Head to the "User Settings".
From here you can update your email address, the engineer's name, contact number, their password, their Gas Safe ID, Oil Registration number and their signature.
If you are using a drawn signature, you will need to click the button "Click here to use the above signature". Otherwise, it will not show.
Note - you will only see the Advanced User Permissions under the signature image if you are on the Growth Plan.
On the App:
Log into the app
On the Home page, select Settings
Here you can edit the engineer's details, including some of the company settings (if you are the company admin)