We suppose that we have the following image (is a single file with 4 radio buttons, seems same but it is for example, the icons could be different):

I saw, a time ago, how to get an image by specifing background-position in CSS style. How to do that ?
Means, how to get the icon from lower-right side in CSS instead splitting that file in four icons separately ?
Sorry if this question is obsolete but I’m beginner in CSS.
Have a look at the
background-positionattribute.MDN has an article about it, including examples.
There are also a number of articles available about image-sprites with CSS.