Sorry I couldn't properly summarize the feature request but hopefully it will be easier to understand by an example. Clicking on the "Align" button multiple times (text edit mode) will cycle through the available options (Top Align, Centre Vertically, etc). The problem is that if you go beyond the one you need, you have to click again a few times until you can go back to the previous one (and hopefully you will not miss it then). Using a modifier when clicking could reverse the cycle direction, so eg. ctrl+click would allow going back instead forth. Perhaps this behaviour would be handy on other buttons too (sorry, I'm a rookie in Affinity Designer).
