ios - Xcode 6.1 replace greyed out / not available -

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i'm trying use find / replace in xcode replace deprecated functions seems greyed out reason. i'm still finding way round xcode may simple, can't find it's unavailable?

i'am using xcode 6.1, find&replace working fine me. type replace text , press return key

when open, appears greyed out

enter image description here

press return key after entering text

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