The manager has Campaigns, Ad Groups, Ads and Search Terms tabs. In the Campaigns view, click the expand arrow on a campaign to see the ad groups inside it, and expand an ad group to see its ads, all on the same screen. You can also click a campaign's name to drill into the ad groups view, with a breadcrumb at the top to go back. Google doesn't use traditional ad groups for Performance Max campaigns: when you expand a PMax campaign, you see its asset groups, and its ads can't be edited individually through the Google API. The date filter at the top (Today, Yesterday, Last 7 days, Last 30 days, This month, Last month, Maximum or Custom) applies to all views, and the Refresh button reloads the data.