To create or edit an Iceberg order in Mosaic first click on "Advanced" in the Order Entry window. Click in the "Iceberg --" field and enter a value (amounts for stock orders should be in 100 share round lot increments) into the field provided. Click Enter on your keyboard to submit the value. This value will serve as the size increment of the amount displayed for your order.
If you want to remove an Iceberg order's Display Size, click on "Advanced" in the Order Entry window. Once there, click on the Iceberg value you entered and hit the backspace or delete key on your keyboard to erase the value entered.
For more information, please visit the Interactive Brokers website.[