The gist is to save some time by not having to click on the boxes and buttons. Right now, when I craft an item I have to either: 1.click on the search box, type something, click again on the item, click on the amount desired, and click craft. or 2.click and drag the little slider (most of the time waaay too small), click on the item I want, then click on the amount desired, type in, then click craft. This is incredibly tedious in a game where crafting is almost the most carried out action. My suggestions are to add scrolling with middle mouse wheel to the slider, and to auto-highlight the search bar when opening the gui, add a keyboard key to craft (like enter or c) , middle mouse wheel for quantity, maybe some keys to increase or decrease value (hold down to increase 1 by 1 which turns into 5 by 5, 10 by 10) and viola, an easy crafting menu that can be maneuvered entirely by keyboard or mouse.
You already can use the scroll wheel to navigate the window, provided you have your cursor over it. But I agree that typing with the crafting menu open should automatically enable to search bar.
