Tap the icon on main screen to open Inventory, in which there are 4 labels,
Tap “Store” to open portable store, buy and sell items;
Tap “Sort” to rearrange positions of items you own.
Higher the level you reach, more slot will be unlocked to expand the capacity of your inventory.
Before level 10, each character has 25 slots; Lv.10 to 30, 5 slots will be unlocked with each 5 levels;
At Level 30, each character has 50 slots.
You may also unlock extra slots with Gold, please be noted that each character has 100 slots Max.