The Insert Column window opens when inserting an event tree column only if Prompt for Branch Types is selected for Event Tree > On Insert column command in the System file properties. Choices provided in this window are the same as those provided for this System file property. However, the very last choice, which is for inserting both success and failure branches, is available only when a column is being inserted at the end of the event tree. For more information, see Event Tree System File Properties.