To copy gradient properties to multiple objects in Illustrator and make them appear as one continuous gradient, select the objects, then use the Gradient Tool. The gradient window will show each object having its separate gradient. To make them one, adjust the gradient across all selected objects using the Gradient Tool.
Here's a more detailed breakdown:
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Select the Objects: Use the Selection Tool (V) to select all the objects you want to apply the gradient to.
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Activate the Gradient Tool: Choose the Gradient Tool (G) from the toolbar.
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Adjust the Gradient: With the Gradient Tool active and the objects selected, click and drag across the selected objects to define the direction and length of the gradient. This will apply the gradient across all selected objects as if they were a single object. You may need to experiment with the start and end points of the gradient line to achieve the desired effect.
- The gradient panel will allow you to further customize the gradient colors, midpoints, and type (linear or radial).
Alternative Method (Using the Eyedropper Tool):
While the gradient tool method joins gradients into one, the eyedropper copies one object's gradient to others.
- Select the destination objects: Select the object(s) you want to apply the gradient to.
- Select the eyedropper tool: Activate the eyedropper tool.
- Sample the source object: Click on the object that has the gradient you want to copy.
- Note: by default, the eyedropper copies all properties, including stroke and appearance. If you only want to copy the gradient, double click on the Eyedropper Tool to open options. Uncheck everything other than Fill. Click "OK".