Master Layers - Photoshop for Beginners | Lesson 2

Layers in Photoshop are akin to transparent sheets of paper, allowing you to draw or apply adjustments without affecting the underlying image. This provides flexibility to move, rotate, resize, and remove elements independently. Directly painting on a single background, however, locks the changes and limits editing capabilities.

Layers are crucial for maintaining flexibility in design. An example demonstrates how different layers for background, text, and subject allow for individual manipulation and adjustments. Merging layers, while making the image appear as one, removes all editing flexibility, highlighting the importance of separate layers.

Layer visibility is controlled by an eye icon; clicking it toggles the layer's visibility. Holding 'Alt' (or 'Option' on Mac) and clicking the eye icon isolates a single layer, turning off all others, and clicking it again restores previous visibility. This feature is vital for inspecting individual adjustments in complex projects.

If the layers panel is missing, it can be restored via 'Window > Layers'. Background layers are automatically locked and have limitations: they cannot be renamed, reordered, or have their opacity/blend mode changed. Erasing on a background layer fills with the background color instead of creating transparency.

To remove background layer restrictions, click the lock icon or double-click the layer to convert it to a regular layer. Blend modes allow layers to interact with those beneath them in various ways (e.g., 'Screen' brightens, 'Multiply' darkens, 'Overlay' adds contrast). Opacity controls the transparency of a layer.

Smart objects are non-destructive layers that preserve original image data, allowing for scaling and filter application without loss of quality. They cannot be directly painted on or pixel-manipulated; they must be rasterized first. Raster layers are pixel-based and directly editable but lose quality upon repeated scaling.

With a non-brushing tool selected, numerical keys (1-0) quickly set layer opacity to 10%-100%. Pressing two numbers rapidly sets precise percentages (e.g., '74' for 74%). Holding 'Shift' while dragging on the opacity parameter changes it quickly; holding 'Alt' (or 'Option') changes it slowly for fine adjustments. Transparency is indicated by checkerboard patterns in Photoshop.

To remove a white background, convert the background layer to a regular layer, then use the Magic Wand tool to select white areas and delete them. The 'Tolerance' setting determines the range of colors selected. Images with transparency should be saved as PNGs, not JPEGs, as JPEGs do not support transparency.

This project demonstrates creating a popular 'text behind subject' effect. Key steps involve duplicating the background layer ('Ctrl/Cmd + J'), converting to a smart object for non-destructive edits, and using the Camera Raw filter's geometry tools to straighten crooked elements. The subject is then isolated using 'Select Subject' and masked.

To make text visible against a bright background, an 'Exposure' adjustment layer is created, placed beneath the text, and its exposure decreased. This darkens the background without affecting the subject or text. Canvas alignment tools are used to center the text.

A new layer filled with 50% gray (with blend mode 'Overlay') is created and converted to a smart object. 'Add Noise' and 'Gaussian Blur' filters are applied non-destructively to create a subtle grain texture. The crop tool is used with 'Delete Cropped Pixels' unchecked to expand the canvas, and a portion of the original image is stretched to fill the new areas.

Layers can be duplicated by holding 'Alt' (or 'Option') and dragging. 'Snap' and 'Snap To Guides/Layers/Document Bounds' are enabled via 'View > Snap To' to assist with precise alignment of elements using pink Smart Guides. Layer grouping ('Ctrl/Cmd + G') helps organize and collectively manipulate related layers.

Masks can be refined by painting with white (shows) or black (hides) using the brush tool directly on the mask thumbnail. Additional adjustment layers, like 'Color Lookup', can be applied globally or specifically to certain layers using clipping masks (holding 'Alt/Option' and clicking between layers).

Photoshop offers various layer types: Raster layers (pixel-based, directly editable but lose quality on scaling), Smart Objects (non-destructive, preserve original data, ideal for scaling and filters), Adjustment Layers (non-destructive color/tone corrections), Text Layers (vector-based, scale infinitely without pixelation within the canvas limits), and Shape Layers (vector-based, similar to text layers in scalability).