
Click Make private on the Sharing Settings dialog box to remove the file and file link, if applicable, from everywhere that it's been shared. Or click Restrict access to remove the file from everywhere that it's been shared except the library (only for files that originated in a Salesforce CRM Content library)..
Full Answer
How do I Turn Off the ability to edit posts and comments?
From Setup, enter Chatter Settings in the Quick Find box, then select Chatter Settings. Click Edit. In the Post and Comment Modification section, deselect Allow users to edit posts and comments.
What are the different types of icons in Salesforce?
Effects of the size attribute and inverse, success, warning and error variants. Action icons represent actions a user can take. The default size of action icons are larger than the others. Doctype icons represent a type of file when a preview or image is unavailable. Standard icons represent entities and objects within Salesforce.
What are doctype and utility icons in Salesforce?
Doctype icons represent a type of file when a preview or image is unavailable. Standard icons represent entities and objects within Salesforce. Utility icons are used throughout the interface and are SVGs for extensibility. Custom icons are available in Salesforce to represent user created objects.
Who can delete chatter posts in Salesforce?
Chatter posts, like any other data in Salesforce, are stored forever unless an authorized person deletes them. Here's who can delete posts: Users without any special permissions can delete their own posts, posts on their own Chatter wall items, and posts on records they own.

Example Options
Basic Icons Action icons, doctype icons, standard icons, utility icons, and custom icons.
Basic Icons
Action icons represent actions a user can take.
