However, when hitting the play button to preview your motion, it will go
from frame 1 to 250 and not stop at 90. That is also true for rendering.
Instead of rendering 90 frames, you will process 250. Always change the
start and end frames according to your project requirements.
7.1.1 Adding keyframes to objects
To add keyframes in Blender, we can use several methods from
keyboard shortcuts to the Context menu. No matter the way used to
create keyframes, you won't be able to make animations without them.
After selecting an object, you can use the I key to add a keyframe. That
is the easiest way to add keyframes to anything in Blender.
Once you press the I key, a list with all available keyframe types appears
(Figure 7.3).