Journal level metrics are more difficult to find than author metrics, but this is only because you cannot outright search for a journal. Begin by selecting "Source title" from the drop down menu of document search.
Next, type in the name of the journal or conference proceeding you are trying to locate metrics for. For this example, we will use the "Journal of Late Antiquity". Click on the title of the journal you wish to view from the results, it will be in the right hand side of the record.
This will bring up the journal's record page which contains metrics such as CiteScore, Scimago Journal Rank (SJR), and the Source Normalized Impact per Paper (SNIP).
There are four main search types in Scopus...
Document searches are basic searches where you either know the title of the article you are looking for, or have keywords in mind so for example if you don't have a particular item in mind you could try to search for "romans AND britons" this will bring up all of the articles in Scopus which have both of these in the title.
The second form of search is if you are looking for a particular author. In this case lets say we are looking for Purdue's Expert X You would first click on "authors" and from their type the name of whomever you are looking for.
Researcher discovery is a search form that allows for you to search for scholars who publish on a specific topic. So for example if I am interested in researchers who publish on the concept of "Romanitas". I simply have to put that into the search bar, and hit search. Scopus will then search all of its records for researchers who match this description or who have published on this topic. You can also capitalize the words "AND" or "OR" to broaden and strengthen your search.
The Organizations Tab allows you to view institutional level metrics and more. These pages allow you to compare institutions, and to see how they stack up or contrast against each other. Unfortunately there is no way to view metrics for multiple institutions side by side.
Another function of Scopus is the ability to compare up to 10 journals. To do this from the journal's record select "compare sources" from the top right.
From their, in the left hand column you can type and search for whatever journals you would like to compare. Scopus will then produce comparison charts between up to ten sources at a time. You can toggle between charts and tables on the upper right of the menu.