In learning a presentation document, learners generally need to select a number of slides from the document, which describe what they want to learn or should learn. However, it is not so easy to find out the slides to be learnt since the connections between the adjacent slides are not explicitly expressed. They accordingly take more time to learn and finish learning with incomplete knowledge. In order to address this issue, this paper introduces a map called slidemap for visualizing the logical connections between slides. This map helps learners identify the sequence of slides to be learnt from a presentation document and comprehend the structure embedded in the document in a shorter time. This paper also reports a case study involving 16 participants with the tool. The results of the study show slidemap could be more beneficial for learning a presentation document than using PowerPoint user interface.