Login to your edelpaper Workspace. Now click on "Permalink settings" on the right hand side. On the right hand side a box with all possible customizations will open up. Please click onto Permalink settings.
Firstly, enable the checkbox “Activate subdomain for your account“. This is neccessary to reserve the subdomain for your account and nobody else can use it anymore.
Secondly, type in your individual subdomain, e.g. your company name (notice: you can use only one subdomain per account).
Finally, you can choose which of your Permalinks (and which not) you want to assign to your individual subdomain. Do not forget to save.