Would it not be a good idea to change the hierarchy of the presets when setting a new document? Currently, when you input Width and then tab to the next preset, it takes you to measurement units, then to Height. Surely it would be better to either have the measurements units choice before both the canvas dimensions, or after? That way you can input Width then tab straight to Height without looking at what you're doing. It causes problems if you forget that the current sequence is Width>Units>Height when you're inputting your details and only find out after you've input everything incorrectly and have to do it all over again. It seems like a simple fix for a far more efficient workflow.