Below are examples of some items that could be used in a new hotkey slot. This would let us dash, use RoD, have multiple quick mounts, use individual potions, and so much
tModLoader - WeaponOut | Terraria Community Forums
The Ultimate Terraria tModLoader 1.4 Guide! - YouTube
ARMOUR SETS - HOW TO MAKE A MOD - TMODLOADER 1.4 - 07 - YouTube
tModLoader - Calamity Mod | Page 266 | Terraria Community Forums
tModLoader] ExampleMod - Example Dash Accessory - YouTube