In pgAdmin 4 right click on the database and then "Generate ERD (Beta)"

What am I missing? I am able to auth into postgres with psql from Terminal with the connection string, but when I use pgadmin with the exact same info, I just see a big list of this and am unable to see the actual tables:
EDIT: I realize that it's showing me all of the DBs and the one I specifically want is in the list and I can connect to it. But wish I could filter out all the irrelevant ones...
Or, to retrieve all rows, just press the blue data grid.

The tooltip "View data in the selected object" is almost making it too easy.
Try the button with the funnel next to it to retrieve only a selection (for big tables).
Right click on the table and choose "View data"

For a list of alternatives, check out the Postgres wiki:
http://wiki.postgresql.org/wiki/Community_Guide_to_PostgreSQL_GUI_Tools
Go to the properties of your server and check the "restore env" checkbox. That option causes pgadmin to remember your navigation between sessions. It will take you right to the table you selected last time you used pgadmin.
If you set up an ODBC connection to the database, you can access it in Microsoft Access. You can then add the tables you view most often (assuming they're not so many of them) and save them (linked rather than copied) for quick viewing and editing.