Interval Edit Mode
Current frame mode (default)
This is the default mode. When it is enabled, all adjustments you make to the scene objects only affect the current frame.
Interval edit mode
When this mode is selected, adjustments made to the objects are applied to every position of these objects on the selected interval. For example, moving an object in one frame will move it in every other frame of the interval.
When this mode is used, the Viewport window is marked with a red border.
When an interval is edited in this mode, its type of interpolation is changed to Fixed. This happens because transformation is applied to every frame, not just to keyframes.
If you want to avoid this, disable the Fixing interpolation on change parameter in the Settings tab. This way, transformations will be applied to keyframes only.
Interval edit mode with a fixed pivot
In this mode, manipulators are also applied to every frame on the selected interval, but in relation to a pivot, i.e. to the position of the selected object in the current frame. Adjusting an interval in this mode also changes its type of interpolation to Fixed.
Settings for the Interval Edit Mode can be found on the Settings panel, on the Interval Edit Mode tab:
This option sets how the trajectory is affected during editing. Three modes are available:
The default setting. If this is selected, the trajectory moves as a single entity and doesn’t deform in any way.
If this option is selected, the trajectory deforms in a linear fashion.
If this option is used, the trajectory is deformed using Bezier spline.
These settings affect rotation as well:
Rotation in the Interval Edit Mode with the Linear setting enabled.