Adobe Photoshop 2021 for Mac: A Detailed Operation Guide

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Adobe Photoshop 2021 is professional image processing software released by Adobe, offering a powerful creative toolset on the Mac platform. This guide will walk you through its interface, core workflows, operation tips, and common issues to help you quickly master its core features.

I. Detailed Overview of the Software’s Core Interface and Workspace

After launching Photoshop 2021, you will see an integrated workspace composed of multiple panels and areas.

1. Menu Bar: Located at the top of the screen, it contains all major command categories such as “File,” “Edit,” “Image,” and “Layer.”
2. Options Bar (Control Bar): Positioned directly below the menu bar, its content changes dynamically based on the currently selected tool and is used to adjust the specific parameters of the tool.
3. Toolbar: Located on the left side of the interface by default, it contains all creative tools such as selection, crop, brush, stamp, and type. Tool icons with a small triangle in the lower-right corner indicate hidden tool groups, which can be expanded by long-pressing or right-clicking.
4. Document Window: The central area that displays the image file currently being edited. Each open file appears as a tab.
5. Panels Area: By default, it is docked on the right side of the interface. The core panels include:
   • Layers Panel: Manages all layers, groups, and layer effects in the document, and is the core of Photoshop.
   • Color/Swatches Panel: Used to select and set the foreground and background colors.
   • Adjustments Panel: Quickly create non-destructive brightness/contrast, hue/saturation, and other adjustments for layers.
   • History Panel: Records operation steps and allows you to revert to a previous state.
   • Properties Panel: Displays detailed properties of the currently selected layer, text, or shape for adjustment.

You can switch between different preset workspaces (such as “Photography” and “Painting”) via the menu bar’s “Window” > “Workspace”, or drag panel tabs to customize the layout.

II. Complete Workflow from Creation to Export

1. Create or Open a Project

Create a New File:

1. Click the menu bar “File” > “New”, or use the shortcut Command + N.
2. In the pop-up dialog box, set the file name, dimensions (such as width, height, resolution), color mode (RGB/CMYK), and background contents, etc.
3. Click “Create” to enter a blank canvas.

Open an existing file:

1. Click the menu bar “File” > “Open”, or use the shortcut Command + O.
2. In the Finder window, select the image file you need to edit.

2. Basic Image Editing and Creation

Example: Add text to an image and perform simple color adjustments

1. Place an image: If starting from a blank canvas, you can drag an image directly into the document window, and it will be placed as a smart object layer.
2. Adjust the image:
   • Select the layer containing the image in the Layers panel.
   • Use the menu bar “Edit” > “Free Transform” or press Command + T to scale and rotate the image. Drag the control handles to adjust, and press Enter to confirm.
3. Add text:
   • Select the “Horizontal Type Tool” (T) from the toolbar.
   • Click on the canvas and enter text.
   • Change the font, size, and color in the options bar. A new text layer will be created in the Layers panel.
4. Color adjustment:
   • Select the background image layer in the Layers panel.
   • In the Adjustments panel, click the “Hue/Saturation” icon. This will create a new adjustment layer above the current layer, modifying the color non-destructively.

3. Save and Export Files

Save the working file:

1. Click the menu bar “File” > “Save” or press Command + S.
2. When saving for the first time, you need to choose a format. To preserve all layers and editability, please choose the Photoshop (.psd) format.

Export as a universal image format:

1. Click the menu bar “File” > “Export” > “Quick Export as PNG” to quickly generate a PNG image with a transparent background.
2. If you need more control, click “File” > “Export” > “Export As” or use Command + Shift + Option + S.
   • In the pop-up dialog box, you can choose the format (JPG, PNG, GIF), adjust the size, and configure quality settings.
   • Click “Export All” and choose the save location.

III. Advanced Tips for Common Features

1. Non-destructive editing: Use adjustment layers, layer styles, smart objects, and smart filters as much as possible. They allow you to modify or undo effects at any time without damaging the original pixel data.
2. Advanced selection techniques: Use the “Select and Mask” workspace (accessible from the options bar of any selection tool, or by pressing Option + Command + R) to finely handle complex edges such as hair and semi-transparent objects.
3. Layer Mask: Click the “Add Layer Mask” icon at the bottom of the Layers panel. Use a black brush to paint on the mask to hide layer content, and use a white brush to restore visibility. This is the core technique for compositing images.
4. Content-Aware Fill: Use the selection tool to select the object you want to remove, then click “Edit” > “Content-Aware Fill”. Adjust the parameters in the new window, and Photoshop will automatically fill the selection with surrounding content.
5. Object Selection Tool: This tool was enhanced in the 2021 version. Find it in the toolbar and roughly drag around the object, and Photoshop will automatically detect and create a precise selection.

IV. Common Problems and Solutions

1. Problem: The tool cursor turns into a crosshair or other strange shapes.
   
   Solution: Press the Caps Lock key to switch between the precise crosshair cursor and the standard tool cursor.
2. Problem: You made a mistake and want to undo multiple steps.
   
   Solution: Press Command + Option + Z multiple times to step backward progressively (unlike the default Command+Z single-step toggle). You can also click an earlier state in the History panel.
3. Problem: The Move tool accidentally selected a layer outside the canvas.
   
   Solution: In the options bar of the Move tool, uncheck “Auto-Select,” and make sure the dropdown menu on the right is set to “Layer.” After that, the Move tool will only move the layer currently selected in the Layers panel.
4. Issue: When saving as JPG, does it prompt with the “Save for Web” format option?
   
   Solution: In the “File” > “Export” menu, the “Export As” and “Save for Web (Legacy)” features overlap. The former is more modern, while the latter offers more web optimization options. Both can be used to export JPG/PNG/GIF.
5. Issue: Slow performance or lag.
   
   Solution: Check the menu bar “Photoshop” > “Preferences” > “Performance”. Make sure Photoshop is allocated enough memory (70-80% is recommended), and increase the history states and cache levels. Also, ensure that GPU acceleration is enabled.

V. Photoshop 2021 for Mac Essential Keyboard Shortcuts Summary

Tip: You can view and customize all shortcuts in the menu bar under “Edit” > “Keyboard Shortcuts”.