I can't make sequencer render from negative frames, always starts from zero!? PLEASE HELP

I’m having the same issue on 5.5 (May 2025), I’m wondering if there is a way to group sequencer events and then move them all together.
I am able to select all layers, but wen moving the timelines, it will only move the one the mouse is grabbing.
I’ve also tried the methods above by offsetting by frames and it’s not working on UE5.5
Any help will be appreciated.