With the "Showing Craftable" button in the Recipe Book is enabled, you can still hold your mouse over some items to see uncraftable items.
- Grab 2+ types of logs (Dark Oak, Birch).
- Throw one of them out (Birch).
- Open the Recipe Book (Inventory or Crafting Table).
- Put the Recipe Book into "Showing Craftable" mode.
- Press and hold your left mouse button and hover over the recipe for wooden planks.
- You will see both the craftable planks (Dark Oak) and the uncraftable planks (Birch).