Disable download option SAP Mobile Documents

Hi,

In SAP Mobile Documents it have 3 roles,

• Administrator: Owns the team share and can assign members.
• Contributor: Can add, edit, or delete documents in the team share.
• Reader: Can view the documents in the team share.

I tried with Reader roles, user able to download the file. Can I disable it? So user just only can view only.

Thanks.