Help for Stock Ledger, Stock Balance and Stock Projected Qty

hi everyone, where can i find an explanation about the stock ledger, stock balance and stock project qty, for example i want to know what’s mean the field balance qty, whats the diference between this field and qty, just a font to study about this reports.
Thanks for help.

Have a look to erpnext user manual …docs

Hi @JoEz i’ve already take a look on manual but didn’t find anything about this specifically, something like but not specifically about how it works, but thanks for help.