For instance, if you right-click at the X Location field:
Insert keyframes: Creates a keyframe for all three axes in the
location property.
Insert Single Keyframe: Adds a keyframe only to the X location
property.
By using the right-click at single option properties, you won't have to
choose keyframe types. You will have to choose whether adding the
keyframe to a single property or all three (X, Y, and Z-axis). That
depends on the type of animation you need.
After adding a keyframe to those properties, a yellow background
appears at the property editor. That is a visual code showing a keyframe
that exists at that property in the current frame. On the right, notice that
a diamond-shaped symbol appears instead of the small dot available in
all properties (Figure 7.6).