Individual holds on your accounts may be displayed in the menu "Overviews" - "Hold Payments". Majority of holds are card payments that are already made but not yet posted. However, refunds from an e-shop (in case you have cancelled or returned your order) may also be found here, although these are not holds in the real sense. Use the selector in the upper part of the page to choose the account for which you wish to display the holds.
Once you select an account, you will be able to see a total of all holds for the account: "Holds Total" and also "Refunds Total" in case there are refunds.