Import Parts
If you have an existing tool, you can import it into the planner to play around with it.
Randomizer
The randomizer feature allows you to generate tools with random part materials.
Modifiers
You can add and remove modifiers, with the restrictions on modifiers being the same as if you were making the tool for real.
Bookmarks
Bookmarking tools that you've created allows you to reference them and bring them up again later.
Editing Modifiers
You can preview what the tool would be like before adding or removing a modifier, as well as upgrading or downgrading a modifier level.
Starred Tool (cont.)
An example - the Binding and Tool Handle are automatically moved from inventory, into the slots. The Small Axe Head is missing as indicated.
Editing Modifiers (cont.)
For modifiers that can have a variable amount added, such as Haste, there's a slider so you can customize as exactly as you'd like.
Editing Modifier Stack
The order modifiers are added to the tool can be changed (hamburger menu in top right). Useful when dealing with modifiers with prerequisites.
Sorting
Sorting allows you to easily compare the stats of different tool part materials.