Watch the tutorial video here: https://www.invisionapp.com/studio/learn/editing-animations-timeline
If you’d like to get in and get some more granular control over the speed and the timing of each and every object that’s animating, head over to the inspector and choose edit timeline. The timeline will appear on the left with indicators for every object on your screen.
Clicking and dragging these indicators around will give you control of how much delay your transition has for that particular object.
At the top, there's a dropdown menu that will say something like 1X. You can change this to alter the playback speed. Note that this doesn't alter the prototype at all. It just allows you to view the playback at different speeds to better watch what your animation is doing.
As you slow down the playback, you might notice that some objects or images just fade in/out rather than truly transitioning. This just means Studio didn't register a match between the two objects. You can force change this by auto linking the layers.
For a more detailed walkthrough, visit the link at the top of the page.