  User interface (UI) is point of interaction between user and computer
software. The success and failure of a software application depends on User
Interface Design (UID). Possibility of using a software, easily using and
learning are issues influenced by UID. The UI is significant in designing of
educational software (e-Learning). Principles and concepts of learning should
be considered in addition to UID principles in UID for e-learning. In this
regard, to specify the logical relationship between education, learning, UID
and multimedia at first we readdress the issues raised in previous studies. It
is followed by examining the principle concepts of e-learning and UID. Then, we
will see how UID contributes to e-learning through the educational software
built by authors. Also we show the way of using UI to improve learning and
motivating the learners and to improve the time efficiency of using e-learning
software.
