(This functionality is available
with the Background Images module)
World files provide information enabling the automatic georeferencing of an associated image when importing the image into LISCAD.
LISCAD can only use the world file to register the image if it is located in the same folder as the selected image file, has the same name, and has the an extension that follows this rule: The second letter of the original filename extension is removed, and the letter "w" is added at the end. For example, picture.jpg → picture.jgw or picture.tif → picture.tfw
Refer also to the Import and Register Image topic.