I mean holding down the buttons and using left and right to change books, you only have to press the button once to bring up macros and then use left/right to choose one. You have to hold the buttons down to flip pages in the same book using up and down, it'd be nice to be able to change books in the same fashion using left/right, although there may be an issue for people using keyboards and arrow keys for their macros...though not sure why you wouldn't just hit ctrl/alt + #
Edit: Thinking on it, to solve that problem they could make us hold ctrl+alt(or equivalent buttons) together then use left/right to change books, might be a work around keyboards having to hold ctrl/alt to choose a macro using arrows