The mask is a vector path which allows part of an object to show while blocking out the rest effectively making part of it transparent. A mask in an illustration program is functionally equivalent to a clipping path in an image editor.

Masks can be made to create many kinds of effects. A type mask can be combined with a background photo.



This is the mask created by converting type to curves.



This is the type mask when combined with the background image.



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You can create a mask which will knockout the background.



Using the Pen, draw a path around the bird in the photo.



This is a view of the path only.



When the path is made into a mask and combined with the background image, the background becomes transparent.



Goodluck!