Default Screen Options lets you show-hide different dashboard widgets, customize layout etc and Help section provides you support and guide for the WordPress admin area pages. Now by using a new plugin you can easily customize WordPress Screen Options and Help section present in the top right corner of WordPress admin area Dashboard, you can also change its display based on the user role.
First of all install and activate Screen Options and Help Show Customize plugin and then start customizing Screen Options and Help section from Dashboard -> Settings -> Screen Options Customize, here you can easily show and hide items (based on user roles) in Screen Options and Help section by checking and unchecking boxes.