Adding a shadow to your popups can create a sense of depth and make them more visually appealing. Here's a step-by-step guide to add a shadow to your popups in Poper.ai:

- Log into your Poper.ai account and access your dashboard.
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- Click on “Campaigns” to see your existing campaigns.

- Identify the popup you want to modify and click on it. This will take you to the popup editor.

- Look for the "Global Settings" on the left side of the popup editor.

- Within the "Global Settings," scroll down until you find the "Shadow" section.

- If the shadow is not already enabled, turn it on by clicking the toggle next to "Shadow".

- Adjust the 'X' and 'Y' sliders to set the horizontal and vertical offsets of the shadow.

- Use the 'Blur' slider to control the softness of the shadow edges.

- Click on the color box to choose the color of the shadow. You can pick a color from the palette or enter a specific color code for precision.

- As you make changes, observe the popup preview to see how the shadow looks in real-time.

- Once you are content with the shadow effect, click the "Update" button to save your changes.

- View the popup on your live website to confirm that the shadow displays correctly in different browsers and screen sizes.

This process should help you enhance your popups with shadows, thus making them stand out and grab your users' attention.