The phone lights up after the woman has already turned toward the door. In the next shot, her coffee cup suddenly appears on the other side of the table.

Small breaks like these often begin during planning. Two nearby keyframes show different positions, but nothing explains how the scene moves from one to the other.

When planning a clip with the Kling 4.0 AI Video Generator, use keyframes to mark important moments—not every passing second.

One keyframe, one clear decision.

Start with three useful moments

For a simple café scene, the plan might be:

Opening: A woman sits beside the window, holding a coffee cup.

Turning point: Her phone lights up and catches her attention.

Ending: She puts down the cup and looks toward the door.

These frames give the scene a clear direction. The prompt can handle the movement between them.

If a reference already shows the clothes, table, cup, and window, there is no need to describe everything again. Use the prompt for details a still image cannot show clearly: timing, movement, camera direction, and shifts in attention.

Make every extra frame earn its place

Before adding another keyframe, ask:

What new information does this frame provide?

Another frame may help when:

the subject turns or moves to a new position;

an important object enters the scene;

the camera shifts to another angle;

the setting or lighting noticeably changes;

the final composition needs clearer guidance.

If it only shows that another second has passed, it may add clutter rather than control.

Review the ordinary details

The main action can look right while a smaller detail breaks the scene. A cup may switch hands, a phone may move, or warm afternoon light may suddenly become cold.

Watch the complete clip twice. First, follow the story. Then check:

hands and small objects;

subject position;

lighting direction;

camera movement;

voice and action timing, when audio is included.

Add exact captions, prices, and logos during editing when accuracy matters. Only use reference images, footage, and voices that you own or have permission to use.

The same rule keeps a Kling 4.0 workflow manageable: do not fill every slot simply because it is available. Check the controls shown in your current mode, then choose only the frames that help the action read clearly. Duration and reference options may vary by access point.