synchronize a trigger on a second layer

I would like to know if it is possible syncronize a trigger on a second layer with the timeline of the base layer.

Example: at time 00.20 I go to a second layer by clicking a trigger in the base layer. I would like another trigger (in this second layer) appears at 00:30 of timeline of the base layer (not at 00:10 of timeline of second layer because I could click the first trigger also at 00.25).

Thanks for your help

I'm using Storyline 3

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