The search page itself contains a description of how to use the search engine. The text was written by Haraldur Sigur sson. Included in the text are maps from each period. Clickable only if the search returns more maps than can be contained on one page. Text is suitable for those who have a slow internet connection and want the search results right away.
Thumbnails are good for comparing maps of similar origin.
Thumbnails and text is the default option. It returns a large thumbnail to the left of the screen and the text to the right. Additional information about the search can be found on the search page. When the search returns the results, it is possible to narrow it to a group of selected maps. This button is located at the bottom of the page, between the arrows.