Overall this can vary slightly with what website platform you are using.

Most website platforms will let you add a link to an image in their text editor. Here are some how-to articles for some popular website platforms.

You can also manually add a link to an image through an HTML editor. You would use the following code:

<a href="insert custom affiliate link"><img src="insert image location" title="insert title" alt="insert image description"></a>

You would replace the text that reads "insert custom affiliate link" with your custom affiliate link. 

Then you would replace the "insert image link" with the link to the image you would like to use.

Next you would give the image a title in the "insert title" section, and a image description (for screen readers) in the "insert image description" section.