One issue with the recipe tree screen is that when the tree becomes too large, it becomes impossible to see the material list without zooming out first (due to gui/resolution). Not to mention that it requires the user to pan down on the recipe tree every time a change is made or you have to open the recipe tree screen again.

Therefore my suggestion is to add a setting toggle for the placement of the material list relative to the recipe tree. Specifically if the material list should be below, or above the tree.

Another benefit to this would be that you can immediately see the change to the material cost/leftovers of a tree as you adjust the output quantity (rather than having to pan down constantly). Not to mention you will immediately see the material list guaranteed upon opening the recipe tree screen.

Thanks,
-Piano

Example of the GUI scaling issue:

Area where the material list would be placed when you have the toggle set to "Above":

Could also be useful to have an option to fix the material list to the edge of the screen instead of it being next to the tree.