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| Layers | One of the core building blocks in Photoshop. Layers allow the user to separate elements in a design so they can be edited individually. |
| Locking Layers | The ability to prevent edits from happening to a specific layer. Can lock different traits of a layer such as position, pixels, or the entire layer. |
| Groups | Combining layers into folders to manage workflow. |
| Stacking Order | The order that layers are shown in a design. Layers at the top of the layers panel are at the top or front of the document. You can use the layer stacking order to hide layers behind other layers. |
| Linked Images | Images placed into a document that refer back to the source file. If the source file is edited or deleted, the image inside the Photoshop document is also edited or deleted. |
| Embedded Images | Images permanently put into a Photoshop document. The original source image is no longer needed. |
| Destructive Editing | Editing an image in a manner so that the edits can’t be undone. Examples include erasing, cropping, and painting on a picture. |
| Non-Destructive Editing | Editing an image so that the edits can be hidden to reveal the original image. Examples include masking and converting images to smart objects. |
| Smart Objects | A layer that allows certain destructive editing techniques to become non-destructive, such as scaling an image or adding filters. |
| Color Management | Selecting the correct color profile for the given project. The final deliverable and usage of the final product determines the correct color profile. |
| Color Profiles | There are different color profiles / color modes that need to be selected based on what a graphic is used for. For example, printing (CMYK) and screens (RGB) use different color profiles. |
| RGB | Red / Green / Blue color profile used for screens. |
| CMYK | Cyan / Magenta / Yellow / Black color profile used for printing. |
| Grayscale | Color profile that uses black, white, and all the shades and tints in between. |
| Black & White | Only uses two colors, black and white. |
| Color Gamut | The total number of colors a specific device can produce and show. |
| Color Libraries | Specific sets of colors stored in a library together. |
