Ong Choon Keong wrote: > Therefore, am wondering if there's an easy option (perhaps a toggle switch) > to allow me to read the chart in a vertical orientation instead? Am > contemplating to tinker with the *it. files, but not sure how to do so. Hi, I don't know if this will work, but you could try editing the .ti2 file to change the following: STRIP_INDEX_PATTERN -> PATCH_INDEX_PATTERN PATCH_INDEX_PATTERN -> STRIP_INDEX_PATTERN STRIP_THEN_PATCH -> PATCH_THEN_STRIP Graeme Gill.