On Signitic, you have the option to manage your administrators and co-administrators as well as their permissions: you can delegate some or all of the administration to users.
Reminder of roles:
The Admin role allows access to all Signitic features without any restrictions.
The Co-admin role has access to all Signitic features except for the account-sensitive settings (subscription, connector, signature, etc...).
Go to your settings

From your security settings click on: View to the right of the role depending on the role you want to assign.
Add a user

In the Edit module, you can add the user of your choice.
Click on "Add an administrator" to open the dropdown list.
Assign permissions

Permissions can only be modified for roles you manually create, and you can customize them however you like.
Save

To finalize assigning the new role, simply click Save.
An email will be sent to the user informing them of the creation of their account only if they weren't an admin before the change.