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