Select the query you want to run. Execute it via F5. Then highlight the next query and repeat.
The output will append to the Script Output panel.
There's no way to get 2 queries to share a grid, unless you were to run them as a single query a la UNION.
Is it possible to simply click anywhere within a sql instead of having to highlight the entire statement? If not, why not?
sure, but that will execute as a statement, not as a script, and you'll get a data grid for your results