The upper part of the graph is cut off on the retime curve

Question

I'm using the retime curve to change the playback speed, but the upper direction is cut off and I don't understand the situation.
Is there a way to fit it inside the graph?

Answer

By clicking the red circle part with the mouse and dragging left and right, the display scale can be changed and the display becomes possible.

(I don't notice this.)

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