how can see material's name? (don't starve, pc user- x-box pad player)

how can see material's name? (don't starve, pc user- x-box pad player)
when use LT button for make new build
can not check material's name on pad
how can see it?

ex) for making umbrella. 
need violet color monster's tentacle
when i use mouse. can see that name of materials
but when i use pad? can't see detail materials name
pls help