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並前往https://www.rgraph.net/canvas/reference/globalalpha.html

The globalAlpha property - Canvas reference - RGraph

The globalAlpha property sets the opacity to be used for all operations (eg drawing images)

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查詢 「globalAlpha」的人也找了：

  1. globalAlpha
    2.
  2. imageSmoothingEnabled
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  3. strokeText
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  4. globalCompositeOperation
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  5. lineCap
    6.
  6. Ctx restore
    7.
  7. fillStyle transparent
    8.
  8. createPattern
    9.