Disclosed are embodiments of a method, a system and a computer program product for selecting data to be presented in a report form. A selector window is displayed to a user, the selector window displaying periods of time for indicating those periods of time for which data is available. The periods of time are displayed as a stack of temporally aligned time lines that are each partitioned into time periods of different duration, where each partition of a given time line has a spatial extent that differs from the spatial extent of partitions of other time lines, with longer partitions encompassing a plurality of shorter partitions. In response to the user selecting a point on a time line, the method, system and computer program product displays a report of that data. The method, system and computer program product further display a partition within a time line to comprise a visual indicator to indicate the occurrence of at least one event of interest that occurred during the time that corresponds to that partition. The data may represent computer system performance metric data that includes rolled-up data, and an absence of a displayed partition indicates to the user that the corresponding data is not available.