Is there a way to adjust the default duration of a timeline object

New media added to a Storyline timeline has a default duration set to "Show until end". But I have several slides with lengthy timelines because is based on an audio track (and I want to synchronise objects appearance and duration).

At the moment I have two options: (1) copy and existing object of a relatively short duration, change it for the object I want and then adjust to synchronise or (2) insert the new object, disable the "showuntil end" option and then adjust the duration on the timeline.

Both of these options are time consuming and I wondered if there was a way to set a shorter default time for new objects.

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