These are the questions that come up constantly when someone's starting out with Photoshop — the ones that don't always fit neatly into a single tutorial, but trip people up regularly. Why does my image look blurry after I resize it? You're most likely scaling it larger than its original size. As covered in the cropping and resizing guide, Photoshop has to invent pixel data that was never there when you enlarge an image, which always costs sharpness. The fix isn't a setting — it's starting with a larger source image in the first place. Why does Ctrl+Z only undo one step? This is genuinely different from most other software. A single Ctrl/Cmd+Z undoes once, then redoes if pressed again. To step back through multiple actions, use Ctrl/Cmd+Alt/Option+Z instead, or open the History panel (Window > History) to jump back to any earlier point directly. What's the difference between a layer mask and just erasing? The Eraser tool permanently removes pixel ...
Double exposure — blending two images into one so they read as a single, layered scene — looks complex, but it's really just blending modes and masks, covered in earlier guides, applied together toward a creative result. Here's a full walkthrough. What You're Actually Trying to Create A classic double exposure combines a portrait silhouette with a second image — often a landscape, texture, or cityscape — visible only within the shape of the person. The effect works because the two images share overlapping tonal areas, not because of any single "magic" tool. Step 1: Prepare Your Subject Start with a portrait, ideally shot against a plain background for an easier selection. Using the Quick Selection tool (covered in the selection tools guide), select your subject and turn that selection into a layer mask. At this stage, you just need a clean silhouette — the internal detail will be replaced by the second image. Step 2: Convert the Subject to Black and Whit...