Setting accessibility identifier on a xib file

I have a xib file which has a view. Under a view, I have few labels... I am working on UIAutomation and hence want to add accessibility identifiers to the view and each of these labels. How can I do it inside the xib? I googled and found that a field named "identifier" should be used... but I cannot see any suck field for view and label.

Please suggest.

Solution

Here:

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You have to set it up manually, so add a key pressing the + button, change the type to String and the name to "identifier".