With the your images column type set to type set to image (URL), you will be able to view images in your dataset. This is useful to analyze the images at a glance. Below is an example of on how to set the column type to image (URL) in the screenshot below, you can also set this type when creating a new dataset.
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Add Trigger

Once you select the image type, the dataset will be updated to show the image column. You will be able to edit the column value by clicking on the image cell. Keep in mind the column value will be the URL of the image.
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Dataset image preview