When you're creating and editing animations in Wideo, it can be very useful to select more than one object keyframe at a time. This allows you to drag them through the timeline and get different timing effects.
For example, you can use this option when you want the the keyframes at the end of a scene to happen sooner, without having to change the keyframes that appear at the beginning of the scene.
To select more than one keyframe, just hold Shift while selecting all the keyframes you want to drag.
To select all the object keyframes, right click on the timeline and then click select all keyframes.