Select “Users” from the side Menu and click on “Catalog Users” menu

When you choose the user from the list and click on the pencil icon  to edit the details, the “Edit Catalog Users” dialog box will pop up 

In the dialog box, edit the details in the following fields –

Enter the member group in “Member Group” field and enter the owner group in “Owner Group” field.

To give access to mobile catalog, tick on the checkbox of Mobile Catalog

To give access to web catalog, tick on the checkbox of Web Catalog

If you want to permit the user to edit or modify the catalog, tick on checkbox of “Can Modify Catalog” and click on "Save" button.