Kramer Electronics EDID Designer - Manual (Page 26)

24 EDID Designer - Editing an EDID
5.3 Using the Advanced Tab
The following sections describe several workflow aid features found in the
advanced mode.
5.3.1 Advanced - Established Timings
Advanced mode does not aggregate the established timing lists as in simple
mode, so to remove compatibility from a certain resolution you must uncheck it
manually from all lists (in case the standard timing list also exists in the
descriptors).