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Tóm Tắt
1.
Open the “Window” menu, and choose “Layers” to reveal the Layers panel if it isn’t already visible. Use Adobe Photoshop’s selection tools, including the Marquee, Lasso and Magic Wand, to make a selection to invert, rather than inverting the entire image. If you want to invert your entire image, you don’t need an active selection.
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2.
Click on the unlabeled “Create New Fill or Adjustment Layer” button (you can find the button by hovering over the buttons) at the bottom of the Layers panel and choose “Invert” from the drop-down menu that appears. Photoshop adds an Invert adjustment layer to your layer stack immediately above either the topmost layer or the layer that was active when you added the adjustment. If you made a selection before adding the adjustment, Photoshop builds a layer mask for the Invert layer using the selected area to define the area in which the colors invert.
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3.
Drag the Invert layer up or down the layer stack to a new position. Because it only affects the layers below it, its position in the layer stack determines its impact on your file.
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4.
Shift-click on the layer mask applied to your Invert adjustment layer to disable the mask and apply the adjustment to your entire file. Click on the layer mask icon to enable the adjustment again. Turn off the eyeball indicator at the left edge of the Invert layer listing to disable the adjustment itself.
