how do I drop items on my hand. can ı do this . ıf ı cant this is single bad thing on game. ı love your game and sorry for bad language :D

Items you've equipped cannot be unequipped at this time - They can be upgraded, but not unequipped 

Upgrading for example, your starter copper hammer to tin hammer - will just overwrite the slot, for now.

If you meant something else... I dunno what it was.