How do I see time for just 1 person?

The global time page is where you can see all time. Get to the global time page by clicking "Time" in the sidebar.

On this page you'll see all time that has been recorded with the most recent at the top. However you can filter this page to see just the data you want to see.

To do this, click on the filter button above the list view:

When you do this you'll see the filter popup:

From here you can use the "Person" filter to filter to just 1 or more people. And you can combine this with other filters such as date for example:

When you save you'll then see a filtered set of data that only includes items that match your filter criteria:

And you could also use the "Chart" button to show a chart of the filtered data to make it more visual: