We can get the list of all users and web parts in a page by entering the URL of the site with addition of text. We can get all the users by appending “_layouts/people.aspx?membershipGroupId=0” text. We can get all the users in a Site collection as shown the image below. We can have settings for the list of the users.
We can see the Actions for the users as shown the image below.
We can the list of all the web parts in a page by appending “?contents=1” text to Url of the site. It will navigate to SharePoint web parts maintenance page. We can have option to close the web parts, reset and delete the web parts from the page.