How do I turn off decimal formatting and return to integer display?

The "Last Size Extra Decimal" setting can be configured in Stock presets in the following platforms:

• Trader Workstation
• IBKR Desktop…

The "Last Size Extra Decimal" feature controls how Last Size values are displayed across platforms. By default, Last Size values are displayed as integers. When configured, the feature formats Last Size values to a specified number of decimal places, giving users greater precision in how trade size data appears in the interface. This feature is effective starting February 23, 2026…

By default, "Last Size Extra Decimal" is off. In this state, all Last Size values are displayed as integers, with no decimal places…

Client Portal includes a dedicated “ON/OFF toggle for "Last Size Extra Decimal" display behavior. It can be accessed from clicking the User icon from top-right corner:

• OFF (default): Client Portal reads the "Last Size Extra Decimal" setting configured in Trader Workstation, IBKR Desktop, or IBKR Mobile and formats the Last Size values accordingly. The tooltip on hover will show the unformatted raw Last Size…