The elements that can be added in the effect structure and their duration can be configured from the Time Manager.

The Time Manager
For each of the effect elements there is a corresponding check-point and a text field which holds the element’s duration, in frames. Also available here is the Delay parameter, which holds the time which the effect will wait until the first enabled effect element will start. The last text field which can be spotted here is the “Total duration”; this read-only text field contains Creative TextFX’s duration (In plus Wait plus Out), in frames.
Above the elements’ checkboxes there is a horizontal bar containing the Creative TextFX timeline. Between the effect elements there are bars which can be dragged with the mouse for a fine tweaking of the effect elements' durations.
As effect elements are enabled/disabled through the Time Manager, their corresponding configuration tabs switch between active/inactive positions.
In the bottom-right side of the Time Manager section the Loop option is available to be enabled/disabled; as its name states, this option makes the effect run continuously in an endless loop.