When you download transactions they are initially "Unconfirmed". This is signified by a solid blue dot.

Any accounts that contains Unconfirmed transactions will display a blue dot next to the account name in the sidebar.

Select the account to view the your transactions. Any Unconfirmed transactions will display a blue dot on the right of the Description field within the transaction.

Downloaded and imported transactions are placed according to the current sort order of your account's register and so may be dispersed throughout the main window.

You can easily identify these transactions by using the “Unconfirmed” filter at the top of the register, or by looking for the blue dot in the description field.

Once a transaction has been Confirmed, this is signified by the change from a "blue dot" to a "blue circle"