If you’re rotating an entire layer, skip the Quick Select steps. If you don’t see the “Layers” menu, click Windows in the menu bar, then click Layers. The “Layers” menu window will appear in the lower-right corner of the photoshop window.
If you don’t see the Quick Select Tool, right-click the Magic Wand Tool to open a menu that contains the Quick Select Tool.
If you want to rotate the entire layer, you don’t need to select anything. Skip to the next step.
Alternatively, press Ctrl+t (Windows) or ⌘ Cmd+t (macOS) to start a Free Transform.
Click Rotate 180° to turn the object or layer upside down. Click Rotate 90° Clockwise to turn the bottom of the object or layer upward and to the left. Click Rotate 90° Counter Clockwise to turn the bottom of the object or layer upward and to the right. You can also flip the object here.
Click and hold one of the small squares and use the on-screen pointer to rotate the object. The degrees of rotation will appear in a small box above the pointer as you rotate the object.