Increasing the duration of multiple frames at once

I have like eight different layers and I need to make them all twice as long and I’m Really not interested in doing all of them separately. Is there a way to do this? I attached a screenshot of my workspace for context.

If it is the part of one animation, we have to work in one layer, than you could change the exposure, selecting needed leyers> click right mouse button>exposure>set exposure

Ok thanks :slight_smile: