Default Naming Convention for Photos in SL

Is there a way to automatically have photo names default to their file names once uploaded to Storyline? Or does anyone have any personal preferences?

 

For example, when I import the photos below, it displays their file name in the timeline, but they get assigned a default picture number like "Picture 2." So I have to manually change "Picture 2" to "P1013863" which can take awhile if you have 500 photos.

 

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