In contrast with reading a comic book where a reader needs to flip the physical pages, in d-Comics (digital comics) there are no physical pages and no page-flipping interaction. The screen sizes for displaying the comics, as well as the way a reader can interact with the content varies between different electronic devices. The author intended segmentation, used to be well embedded with physical pages, needs to be converted to fit different methods in d-Comics. In a previous experiment, we identified two types of panel sequence segmentations in d-Comics. This article describes a follow-up expert review to justify the detailed panel transition changes for the results collected. Nine categories (character, object, environment, symbol, text, frame, camera angle, drawing style and narrative time) were summarised for analysing the recognised changes for panel sequence segmentation. Besides a confirmation of the earlier results, the outcome of the expert review provided how the segmentations were identified. Based on these results, we argue there are three strategies to be considered by the author when creating panel sequence segmentation in d-Comics – narrative structure, visual space (including visual elements and spatial layout) and interaction.