One of the biggest frustrations with the newer versions of Photoshop is the tabbed interface that opens all of your images in a tabbed row. The good news is that this feature is easily disabled. Here’s how:
Select Edit > Preferences > Interface.
Uncheck Open Documents as Tabs.
Now when you open and create new documents, they will cascade instead of opening in tabs.
The workaround in Photoshop Elements is to choose Edit > Preferences > General and tick “Allow floating documents in full edit mode.” Click OK.
Next, select Window > Images > Float all in windows from the Menu bar. This will cause your open documents to cascade so you can see them all at once and move them by dragging the title bar.