To invert a clipping mask in Illustrator, after creating the clipping mask, simply click the "Invert Mask" button in the Transparency panel.
Here's a more detailed breakdown:
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Create the Clipping Mask: First, select the object you want to use as the mask (the shape) and the object you want to be masked (the artwork). Make sure the masking object is on top. Then go to Object > Clipping Mask > Make (or use the shortcut Cmd/Ctrl + 7). This creates a standard clipping mask.
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Access the Transparency Panel: Go to Window > Transparency. This will open the Transparency panel.
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Invert the Mask: With the clipping mask selected, in the Transparency panel, you should see the artwork and options for blending modes and opacity. Look for a check box labeled something like "Clip" and a checkbox that looks like an "Invert Mask" button directly adjacent to it. This "Invert Mask" button changes the behavior of the mask, so the outside of the mask shape shows the artwork while the inside is hidden. Click this "Invert Mask" button.
Therefore, the key step is locating and clicking the "Invert Mask" button within the Transparency Panel after creating your initial clipping mask.
