Camera movement affects all panels

Hi, I’m a beginner with the software and i have some issues with the camera/ keyframes.

I draw my storyboard and I decide to create my animatic.
In my first scene, i have a horizontal pan and in my fourth scene, a vertical pan.

So, I create my first keyframe and my last keyframe for the horizontal pan.
I move to my fourth scene and decide to make the same thing for my vertical pan.
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But, it extends the last keyframe from the 1st scene to the fourth. It changes the camera for every panels.

I imagine there is a fonction to “cut” the camera effect from a panel to an another but I don’t find it.

I searched in the preference and watched tutorials and nothing about it.

I use the last version of storyboard pro.