Where is the Home Key in CTM?

Can anyone tell me which is the Home Key in CTM. I am new and need to sort a problem

See the blue square in the picture.

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The "HOME" key is on your keyboard, please look for it carefully.

BTW: Some specific computers may not have this key, then you need to press a key combination to replace it, please refer to the instruction manual. For example, in a French notebook with an AZERTY keyboard, you can try "Fn+Left" Arrow.