| Imagine you have a lower third composition with an in-animation, a main part and an out-animation. Now you want to show this lower third over videos with varying durations and the display duration of the lower third should match each video accordingly. In this situation you can add one or several Stopframes to your composition thus allowing it to have a dynamic duration without loosing the original duration of any in- or out-animation. In the figure on the left you can see a composition:builder composition on a FX Layer of just:play. This composition has one stop frame and the duration has not yet been changed. |
| In the figure on the left you can see the same composition as above, but in this case the duration has already been changed (by dragging the end of the composition or by using the Inspector of just:play). In the top area of the composition there is a grey area, which is annotated with "Hold Duration". By changing the duration of a composition, you also change the "hold" duration. |