A transaction can be a membership, event, or auction purchase as well as an invoice payment, donation (general-type transaction), or pledge. All transactions are shown in the Transaction grid under the Transactions and Invoices Module.
Even zero-dollar transactions, such as free event tickets, will be shown on the Transactions grid.
Each constituent's record also includes a Transactions tab, which shows their personal transaction history. The list can be filtered using the checkboxes on the top right to include or exclude pledges, memberships, and soft credits as desired.