When I started my adventure with DaVinci Resolve, one of the biggest limitations I discovered what that it’s not possible to change the framerate of a Timeline. If you created a 30fps timeline, it would remain 30fps timeline. Once you start editing, you even can not change the project framerate! Luckily, there is a trick that allows, to some extend, change the framerate of the timeline. It’s not the most obvious one, but it does the trick and in no time you will be able to change the framerate in DaVinci Resolve!