As a staff or clinic user, you can create prescriptions on behalf of prescribers. Although you can't sign these prescriptions, you can add the details and send them to the prescriber's account to complete the signing process.
To do this, click the 'Prescriptions' tab on the menu and select 'CREATE DRAFT PRESCRIPTION'
Once you enter the patient details and medication details, you will see an option at the bottom with a search box called 'Prescriber'. You can use this to assign the prescription to the prescriber and save the draft.
The prescriber would then be able to see this prescription in their 'pending prescriptions' tab on SignatureRx and sign the prescription at a time convenient to them.