1. A multimedia preview system in a client/server-based network environment for browsing content of requested multimedia data to be previewed, the content to be displayed on a client terminal for accessing a multimedia server configured to hold the requested multimedia data, the multimedia preview system comprising: an interface configured to receive commands indicating a speed at which the multimedia preview system is to browse through at least one of text and an image associated with the requested multimedia data; and controlling means for controlling visual information for different abstraction levels based on a weighted semantic value of the requested multimedia data and for adapting an abstraction level of a presentation of the at least one of the text and the image, depending on at least markup tags descriptive for and associated with the requested multimedia data and a frequency of the commands and depending upon a combination of the spatial, temporal and semantic layout of said data, such that the abstraction level of the presentation of the at least one of the text and the image is lower when the speed is lower and vice versa, and for changing a layout of the at least one of the text and the image, depending on the speed, the controlling means including a touch-sensitive display configured to navigate through the requested multimedia data to be previewed.