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42. Changing image resolution with Resize

Image resolution change is needed "for screens", that is, when posting your final artwork on social network websites, and "for print", that is, for printing your final artwork.

First of all, we are going to look at the resolution setting for screens.

From ① the Tool Selection window, select ② Canvas tool.

Select ① Resize.

Turn on ① Keep Aspect Ratio.
Resolution change for screens can be done by selecting ② Pixels.
For screens, you will be changing the pixel count (px), instead of dpi.
Change ③ the Width (px) from 768 to 50. Once you are done, tap on ④ ✓ to finish.

Setting the pixel count to a significantly lower resolution worsens the image quality.
If you decrease the pixel count, you will get more maximum layer limit. Once you reach your maximum layer, try decreasing the pixel count. Also, decreasing the size of the canvas can help you work faster, and make the files take up less space on your device. Now, you can adjust the size of the screen with pixel count (px), and not with dpi.

Next, we will cover resolution settings for printing.
For artwork you would like to print, you can change the canvas size in mm and resolution (dpi). Set the dpi to minimum 300 for clean printed results. Dpi refers to dots per inch (25.4mm).
Caution: when requesting a printing shop to print your artwork, make sure to be aware of your dpi and size. It is extremely difficult to change the dpi afterwards.

Turn on ① Keep Aspect Ratio. Changing resolution for artwork to be printed can be done by first selecting ② Print.
In print, select dpi. Adjust ③ the dpi from 350 to 50.
Once you are done setting the new value, tap on ④ ✓ to finish.

Decreasing the dpi as shown will worsen the image quality.
Next, we will cover reduction calculation method.

Turn on ① Keep Aspect Ratio. Set the size: ② Width(px) from 768 to 150.
Tap ③ Linear, to select a calculation method from Sampling, Linear, and Trilinear.

This is a comparison image.
From the left, the quality changes from low to medium to high. Normally, we suggest choosing Trilinear (since Trilinear uses hardware functions, it may not be applicable in some devices).
Next, we will cover magnification calculation method.

Turn on ① Keep Aspect Ratio. Set the size: ② Width (px) from 50 to 1,500. Tap ③ Linear, and choose a calculation method from Nearest Neighbor and Linear.

Here is an image quality comparison between canvases processed by Nearest Neighbor and Linear. Normally, it's better to choose Linear.

Chapter

  1. Introduction
  2. Start Creating an Artwork
  3. Toolbar and Tool Selection
  4. Do Your Draft Sketch by Hand
  5. About Layers
  6. Let's Trace
  7. Undo and Eraser
  8. Fine Tuning Using the Lasso tool
  9. Check by Reflecting Horizontally
  10. Select Colors in the Color window
  11. Use Color Fill for the Undercoat
  12. Turn Clipping On
  13. Making a Gradation (Shading)
  14. Quick Eyedropper Function
  15. Create Highlights and Shadows
  16. Paste a Texture
  17. Let's Merge Layers
  18. Sign Your Artwork
  19. View Your Artwork
  20. Post Your Artwork
  21. Share Your Artwork
  22. Remove-Ads Add-on
  23. Add Color to the Analog Image using Multiply
  24. Stabilizer
  25. Layer: Clipping is convenient
  26. Layer: Changing the color with Alpha Lock
  27. Layer: Let's try using Screen Tone
  28. Layer: Selection Layer
  29. Layer: Save Layer as Transparent PNG command
  30. Layer: Save Canvas as Transparent PNG command
  31. Layer: Naming your layers to manage them
  32. Layer: Rasterize
  33. Layer: Add Layer from Canvas
  34. Making a Selection with the Magic Wand
  35. Putting texture to the floor with Perspective Form
  36. Skirt with Mesh Form
  37. Entering text with Text tool
  38. Creating manga with Frame Divider tool
  39. Enlarging the canvas with Canvas Size
  40. Cutting off the canvas with Trim
  41. Canvas creation with resolution (dpi) specification
  42. Changing image resolution with Resize
  43. Texture with Material tool
  44. Cut, Copy, Paste
  45. Ruler: Straight Ruler
  46. Ruler: Circular Ruler
  47. Ruler: Elliptical Ruler
  48. Ruler: Radial Ruler
  49. Ruler: Mirror Ruler
  50. Ruler: Kaleidoscope Ruler
  51. Ruler: Array Ruler
  52. Ruler: Array Ruler for Perspective
  53. Ruler: Perspective Array Ruler
  54. Drawing Tool: Straight Line
  55. Drawing Tool: Rectangle
  56. Filter: Brightness & Contrast
  57. Filter: Hue Saturation Lightness
  58. Filter: Color Balance
  59. Filter: Extract Drawing
  60. Filter: Change Drawing Color
  61. Filter: Mono Color
  62. Filter: Gray Scale
  63. Filter: Black & White
  64. Filter: Posterize
  65. Filter: Gaussian Blur
  66. Filter: Zooming Blur
  67. Filter: Moving Blur
  68. Filter: Mosaic
  69. Filter: Stroke (Both)
  70. Filter: Stained Glass
  71. Filter: Wet Edge
  72. Filter: Glow (Inner)
  73. Filter: Stroke (Outer)
  74. Filter: Drop Shadow
  75. Filter: Parallel Gradation
  76. Filter: Concentric Gradation
  77. Filter: Radial Line Gradation
  78. Filter: Auto Paint
  79. Filter: Anime Background
  80. Filter: Manga Background
  81. Filter: Channels Shift
  82. Filter: Expansion
  83. Filter: Sphere Lens
  84. Filter: Table
  85. Filter: Blur Frame
  86. Switching devices / transferring data (with Dropbox)
  87. Switching devices / transferring data (with SD card on Android)
  88. Switching devices / transferring data (with PC on iOS)
  89. Settings window details
  90. Bucket tool details
  91. Blend mode details
  92. How to upload transparent PNG onto Twitter
  93. Notes About Tracing