to create a clickable image whose hotspot is confined to the image alone (as below)

first create a container of the size of your image (container > height width)

then remove padding and margins (style > spacing > margin and padding set to zero)

then import your image to the container and apply the link to the image

if you want to center the image set the left and right margins to auto by:

container - style > spacing > custom margin > select "auto" from left and right things

still, this only gives you a tight rectangular hotspot around the image and is a work around