User139366633 posted
I am not sure of the exact set up of the site that you are using, but there are two ways that I know of to resize an image.
If in design view you select the image control and view its properties, you can change the width and height of the image. (If you wish to do it source view you can, but you won't get intellisense help) By changing only
one of the properties (width or height), the image will maintain its original size ratio. You may select either a percentage of the control's container, or set an actual pixel size.
The second, and probably preferred method is to use a photo editing software to resize the photo first. When the browser resizes the image by way of the first image the image usually loses some resolution. (especially if you are asking it to substantially
enlarge or reduce the image.) A program called Photoscape works pretty well for simple image editing, and is available for free online. (Just google it.)
Hope this helps and good luck.