is there any way to extend the duration of all scenes at once? I saw and understand that you can impact the show-duration for each single scene, but i don't want to click each scene and change it - foremost cause R4 doesn't save that when u exit it and restart it

So, is there a way to show all scenes for my part twice as long as it is now? So that the scenes switches half as often as normally per hour.
I hope u understand what i mean

Thx for help,
Greetings,
Barthsimpson