An image's description is a short statement about the image, up to 50 characters long. The description will be used to identify the image in a list, such as the Maintain Attached Images window, and will be included alongside the image in a form report. You can change the description for an image from an images field in either the data entry grid or form, as long as the images field has been added to the grid layout or form theme.
Modify Images in a Grid or Form
To change the description for an image from an images field, locate the desired record in either the data entry grid or form and follow either of the following instructions:
From the Data Entry Grid — Click 
to open the Maintain Attached Images window and select the image in the left panel of the Maintain Attached Images window. The image and its description loads in the right panel. Select the existing text in the description field and enter a new description for the image. Click 
Save to save the new description of the image.
Once all images are modified for the field, click 
Close to close the Maintain Attached Images window.
From the Data Entry Form — Select the text in the description field below the image you wish to update and enter a new description for the image. Repeat these steps to update more images for the images field.