How to switch off Auto Import with IntelliJ/Scala Plugin

Simple Problem: Ever since I switched to Idea 10.5, it has this auto import feature enabled. For a Java developer, this is surely nice, but every time I type thing like var x: Float it automatically adds import java.lang.Float on the beginning of the file. Very often, it even adds imports I did not even want, from unknown packages deep 开发者_如何学运维in my jar jungle, and prefers Java over Scala packages.

Played around with the switches in Code completion tab, but it keeps on doing this. How can I get rid of this?

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That is plugin bug. This should be fixed soon. It's impossible to turn off in settings. Sorry for inconveniences.

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In 2016.2.3 (Community Edition), this seems to have moved to the SBT pane:

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Check "Code style" -> "Scala" -> "Imports" and "Editor" -> "Auto import" under Settings

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On related note, to turn off auto import popup suggestion when the cursor is moved to line in intellij for mac:

Preferences -> Editor(Under IDE Settings) -> Auto Import -> Show Import Popup