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Adobe Photoshop 2020: The Complete Guide Bootcamp

Lesson 34 of 118

Adjusting Levels with a Histogram


Adobe Photoshop 2020: The Complete Guide Bootcamp

Lesson 34 of 118

Adjusting Levels with a Histogram


Lesson Info

Adjusting Levels with a Histogram

Let's say this is a scanned photograph. You have an old photo of you. You put it on a flatbed scanner, hit the scan button, and here it is in photo shop. Well, if I come in here and choose levels, you should be aware of the bar chart that's in there. That bar chart is called a hist. A gram in all history Graham does is it tells you which brightness levels are found in your picture, in which ones are not. So. If I zoom up on this, if you compare that bar chart to the bar that's down below, that has those brightness levels in it. If you were to pick any shade from that bar and goes straight up until you hit the bar chart, if there's a bar on the bar chart than that shade is found somewhere within your picture. If on the other hand, you choose a shade, you go straight up and there's nothing in the bar chart at all. Then that is not found in your picture. It's not even a single speck of it is in your picture. So what that tells me with this particular hissed a gram is it's empty over here ...

on the left side, and that means the darker shade in the entire picture is right here. And if I go straight down from it, it's exactly that bright. Well, doesn't this slider here for serious to black? And if I pull it over, let's say, just by chance to right there, wouldn't that force the shade that has found directly below two black? That's what it does. And if that happened to be the darkest shade in our photo now the darker shade is black on the opposite side of the history. Graham, you notice a gap over here, which indicates the shades down here are nowhere to be found in the image. There's nothing near white in this photograph, but if I pull this slider in until it touches the history Graham, then that's gonna force whatever is directly below this toe white. And now the brightest area of her picture is white, and therefore, if I were to click OK and open levels again, I'd see an updated, hissed a gram and updated. One would span the entire width because they forced the darkest area to black in the bread hysteria. White zoom out. Look at her picture. There's a preview check box here. If I turn it off, you'll see before turn it back on and you'll see after then. After doing that, If the image is a little too dark or too bright, I could grab the middle slider and brighten it up or darken it up. Then, if I have that printer I described earlier where I'm printing on really cheap paper using ink, and I find that the darkest part of the image I lose the detail and the lightest I could get, I should say the darkest I can get where I can still see detail. Let's just say it was 90% brightness. Well, I could pull this in until it points at 90% and therefore the darkest part of my picture is not gonna be black. It's gonna be what this points at, and you can use the numbers that are in here to figure out exactly what setting you're using its fans from zero, which means no light whatsoever 2 to 55 which is a much light as you can possibly get. And that's because a normal image has 256 brightness levels, and if you count, zero is a number. That's 256. So you could figure out if this is 100% of the light to 55 then what would be 1% of this number? Well, 10% of it will lead 25.51% would be 2. So if you want to convert, you can take whatever percentage you want and multiply it by 2.55 to figure out what it would be in this numbering system.

Class Description

All individual classes that make up this bootcamp are also available here for individual purchase.


  • Develop an understanding of how Photoshop works
  • Create your ideal workspace
  • Configure the essential preference settings
  • Set up Adobe Bridge and Lightroom for optimal integration with Photoshop
  • Navigate multiple images seamlessly


Adobe® Photoshop® 2020 is a feature-rich creative force, perfect for turning raw ideas into audience-wowing images. With Ben Willmore as your guide, you can master it faster than you think and take on a new decade of projects.

Ben takes you step-by-step through Adobe Photoshop 2020 as only he can. With an easy pace and zero technobabble, he demystifies this powerful program and makes you feel confident enough to create anything. This class is part of a fully-updated bundle – complete with 2020 features and more efficient ways to maximize the tools everyone uses most.

Whether you’re a 20-year designer or you’re opening the app for the first time, this is the perfect way to learn and love using Photoshop. From retouching to masking to troubleshooting, Ben unpacks all the essentials and hidden gems, while giving you real-world examples to drive each lesson home. By the end of the class, you’ll feel eager to make serious magic with Photoshop 2020.


  • Beginner, intermediate, and advanced users of Adobe Photoshop.
  • Those who want to gain confidence in Adobe Photoshop and learn new features to help edit photos.
  • Students who’d like to take ordinary images and make them look extraordinary with some image editing or Photoshop fixes.


Adobe Photoshop 2020 (V21)


  1. Introduction To Adobe Photoshop 2020
  2. Bridge vs. Lightroom
  3. Tour of Photoshop Interface
  4. Overview of Bridge Workspace
  5. Overview of Lightroom Workspace
  6. Lightroom Preferences - Saving Documents
  7. How To Use Camera Raw in Adobe Photoshop 2020
  8. Overview of Basic Adjustment Sliders
  9. Developing Raw Images
  10. Editing with the Effects and HLS Tabs
  11. How to Save Images
  12. Using the Transform Tool
  13. Making Selections in Adobe Photoshop 2020
  14. Selection Tools
  15. Combining Selection Tools
  16. Using Automated Selection Tools
  17. Quick Mask Mode
  18. Select Menu Essentials
  19. Using Layers in Adobe Photoshop 2020
  20. Align Active Layers
  21. Creating a New Layer
  22. Creating a Clipping Mask
  23. Using Effects on Layers
  24. Using Adjustment Layers
  25. Using the Shape Tool
  26. Create a Layer Mask Using the Selection Tool
  27. Masking Multiple Images Together
  28. Using Layer Masks to Remove People
  29. Using Layer Masks to Replace Sky
  30. Adding Texture to Images
  31. Layering to Create Realistic Depth
  32. Adjustment Layers in Adobe Photoshop 2020
  33. Optimizing Grayscale with Levels
  34. Adjusting Levels with a Histogram
  35. Understanding Curves
  36. Editing an Image Using Curves
  37. Editing with Shadows/Highlights Adjustment
  38. Dodge and Burn Using Quick Mask Mode
  39. Editing with Blending Modes
  40. Color Theory
  41. Curves for Color
  42. Hue and Saturation Adjustments
  43. Isolating Colors Using Hue/Saturation Adjustment
  44. Match Colors Using Numbers
  45. Adjusting Skin Tones
  46. Retouching Essentials In Adobe Camera Raw
  47. Retouching with the Spot Healing Brush
  48. Retouching with the Clone Stamp
  49. Retouching with the Healing Brush
  50. Retouching Using Multiple Retouching Tools
  51. Extending an Edge with Content Aware
  52. Clone Between Documents
  53. Crop Tool
  54. Frame Tool
  55. Eye Dropper and Color Sampler Tools
  56. Paint Brush Tools
  57. History Brush Tool
  58. Eraser and Gradient Tools
  59. Brush Flow and Opacity Settings
  60. Blur and Shape Tools
  61. Dissolve Mode
  62. Multiply Mode
  63. Screen Mode
  64. Hard Light Mode
  65. Hue, Saturation, and Color Modes
  66. Smart Filters
  67. High Pass Filter
  68. Blur Filter
  69. Filter Gallery
  70. Adaptive Wide Angle Filter
  71. Combing Filters and Features
  72. Select and Mask
  73. Manually Select and Mask
  74. Creating a Clean Background
  75. Changing the Background
  76. Smart Object Overview
  77. Nested Smart Objects
  78. Scale and Warp Smart Objects
  79. Replace Contents
  80. Raw Smart Objects
  81. Multiple Instances of a Smart Object
  82. Creating a Mockup Using Smart Objects
  83. Panoramas
  84. HDR
  85. Focus Stacking
  86. Time-lapse
  87. Light Painting Composite
  88. Remove Moire Patterns
  89. Remove Similar Objects At Once
  90. Remove Objects Across an Entire Image
  91. Replace a Repeating Pattern
  92. Clone from Multiple Areas Using the Clone Source Panel
  93. Remove an Object with a Complex Background
  94. Frequency Separation to Remove Staining and Blemishes
  95. Warping
  96. Liquify
  97. Puppet Warp
  98. Displacement Map
  99. Polar Coordinates
  100. Organize Your Layers
  101. Layer Styles: Bevel and Emboss
  102. Layer Style: Knockout Deep
  103. Blending Options: Blend if
  104. Blending Options: Colorize Black and White Image
  105. Layer Comps
  106. Black-Only Shadows
  107. Create a Content Aware Fill Action
  108. Create a Desaturate Edges Action
  109. Create an Antique Color Action
  110. Create a Contour Map Action
  111. Faux Sunset Action
  112. Photo Credit Action
  113. Create Sharable Actions
  114. Common Troubleshooting Issues Part 1
  115. Common Troubleshooting Issues Part 2
  116. Image Compatibility with Lightroom
  117. Scratch Disk Is Full
  118. Preview Thumbnail