how to adjust this sign ?idk how to call this
I have no idsea what you are asking. If you mean the crosshair, then that is commonly known as the anchor point in your case rather obviously one of a shape layer group. Perhaps read the help?
There is a handy keyboard shortcut to center the anchor point in your layer content.
Ctrl+Alt+home on Windows CMD+OPT+Home on Mac
More info about it here.
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