If you organize your income and expenses into dedicated Categories and Funds, then you can track total income and expenses per Category and Fund.
To track income or expense per Category, go to Accounting > Reports > Category Overview. This report lists both income and expenses per category. If you need detailed transaction lists, use the Detailed Category Transactions
To track income or expenses by Fund, go to Accounting > Reports > Category Fund Statement. This report lists all income and expense Categories by Fund.