To add a Contributor to Squarespace, you can follow these steps.
#1. Access Settings > Permissions & Ownership
#2. Click Permissions & Ownership
#3. Click Invite Contributor
#4. Enter Name/Email Address/Role
#5. Note
- If you need to add a developer to fix code, you need to add admin permissions
- If you need to add a content writer to update page/post contents, Website Editor is enough
#6. Check email and click ACCEPT INVITATION