Final answer:
To make edges distinct in a selected part of an image, use selection tools to isolate the subject and apply an edge-enhancement filter, similar to how zooming in on a subject can reduce background distractions in photography.
Step-by-step explanation:
Applying Filters to Selected Parts of an Image
To make the edges of a selected part of an image distinct, you can apply a filter specifically to that area. First, you need to isolate the part of the image you want to enhance. This can be done using a selection tool, like the lasso or marquee tool, to highlight the most important portions. Once the subject is selected, you can apply an edge-enhancement filter, like the unsharp mask or edge detection, to make the edges clear and distinct. By doing so, the background or unwanted elements become less distracting, much like how cropping or zooming in on a subject can help focus the viewer's attention in photography. For presentations or educational purposes, this technique helps the artwork or visual aids draw attention to the crucial points without overwhelming the students with too much information. Additionally, creating two contrasting fields in an image by dividing it visually can also redirect focus effectively.