Using for example the following test case:

import QtQuick 2.1
import QtQuick.Controls 1.0

ScrollView {
    id: scrollView
    width: 400
    height: 400

    Column {
       // anchors.margins: 10
        spacing: 8
        Repeater {
            model: 30
            Label { text: "label" + index }
        }
    }
}

It is not possible to set margins around the contentItems. It would be nice to be able to set margins.

In tests/manual/testbench/main.qml, a column is inserted inside a ScrollView too. Attempt to set the anchors manually does not work either (and should not be needed as the child item is anchored implicitly to the scroll view). Also if you scroll down to the bottom of the properties side bar, the last item is truncated.