Is this possible to use an image as a representation of dimension in a chart?
For example, I want to create a line chart showing sale of sweets in time. There are 2 categories of sweets: chocolate and cakes, so there are 2 lines on chart - one represents chocolate and the other one cakes. (example attached)
Instead of words "Cakes" and "Chocolate" I want to see some pictures with cakes and chocolate in the legend.