Tree Structure and Navigation in It

Study materials (files, Internet addresses of sites hosting some related information, etc.) can be stored in folders, which can also contain sub-folders (containing other files). Clicking on the name of a file, folder or reference expands it and displays its contents and further information related to it. The objects not hitherto read are highlighted (different background color). When you do not intend to read an object and, at the same time, you do not want it to be displayed as the one not hitherto read, you can mark it as read. The information pertaining to how many times an object has been read and how many times it has been marked as read (rejected) can be found in the access statistics section.