Opening vs. beginning balance line types
Opening balance and beginning balance enable you to record movement accounts. Both beginning balance and opening balance lines downfoot into ending balance lines and the lines between them are called movement lines.
The difference between the beginning balance lines and the opening balance lines are the types of lines that are used for the movement lines. Beginning balance lines have movement lines that are only balance sheet lines (BA & BL) and the opening balance lines have movement lines that are only P&L (PR & PE) lines.