The opacity mask uses the color of one object (normally shades of black and white) to define the opacity/transparency of parts of another object.
Any object or group of objects can be used as an opacity mask.
Each instance of black is made 100% transparent, and each instance of white is made 100% opaque.
Shades between black and white are set to varying degrees of transparency.
Applying the mask by pasting it
- Select the object you want to use as a mask and press Ctrl+C to copy it to the clipboard.
- Select the object, photo or group you want to apply the mask to.
- Go to "Edit" > "Paste" > "Paste opacity mask" or press Ctrl+Shift+M.
Applying the mask via the "Arrange" menu
- Place the object you want to use as a mask on top of the object, photo or group you want to apply it to.
- Select the mask, as well as the object, photo or group.
- Go to "Arrange" > "Apply opacity mask".
- To invert the opacity mask, select the mask and press Ctrl+Alt+V.