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markuswaeger

A and ∝ in the Info panel

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That's the alpha channel value. 

 

In RGB:
0 = fully transparent
127 = Half transparent
255 = fully opaque

 

In LAB/HSL/Greyscale:
0% = fully transparent
49%  = Half transparent
100% =  fully opaque

 

To see it for yourself:

1) Open a new document
2) Go to Document > Transparent Background (to toggle background to transparent)
3) Use the Rectangle Tool to drag a rectangle on the canvas
4) As you change the layer opacity of the rectangle, the Alpha value in the Info Pane will change accordingly

 

post-29590-0-05243900-1482240033_thumb.png

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49%  = Half transparent

 

Half transparent should be 50%. You've been shortchanged: ask for your money back! :lol:


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