Select the Polygonal Lasso Tool (l), and then make a triangular selection around the bottom corner of the rectangle.
使用多边形套索工具(L)，然后在矩形上面做一个三角形的选区。
Activate the Magnetic Lasso tool (l) and then drag a selection area around the green plastic that holds the tack.
激活磁性套索工具(L)和然后拖动周围的绿色塑料持有一个选择区域的粘性。
I made a selection using the Polygonal Lasso Tool (l) and then applied a mask.
我用多边形套索工具(L)创建了一个选区，并添加了蒙版。
Using the lasso tool, I made a wavy, rippled selection which I then feathered by about 25 pixels.
用套索工具，我做了些波浪，选择波纹的时候用的是25像素的羽化。
Using the lasso tool, I made a wavy, rippled selection which I then feathered by about 25 pixels.
用套索工具，我做了些波浪，选择波纹的时候用的是25像素的羽化。
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