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I have been using this solution for IntelliJ 12 for auto popup quick documentation on mouse over.
But the new version of IntelliJ 13 does not do anything when you set the auto.show.quick.doc=true in the idea.properties file.
Any Ideas to get this to work for version JetBrains IntelliJ 13?
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Choose Navigate | Go to Class... in the main menu. In the Enter class name list that appears, start typing the item name. As you type, the list of items narrows down, suggesting names that match the entered substring.
Hover the mouse over the necessary symbol in the editor. Place the caret at the symbol and press Ctrl+Q (View | Quick Documentation). Press Ctrl+Q again to open this documentation in the Documentation tool window.
For ItelliJ IDEA 13 the setting auto.show.quick.doc=true property in the idea.properties appears to now reside in the preferences.
Go to the ItelliJ IDEA Menu -> Preferences -> Editor -> scroll down to the Other section and Check Show quick doc on mouse move
Now you have mouse over Quick Doc functionality working again for ItelliJ IDEA 13:
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