press 'insert', then while holding 'x' drag the red line to the center of the grid. the hit 'insert' again to go to object moving again.
the duplicate thing is just like it says.
there is free tutorial on render globals here. and there's probably another free one at 3dbuzz.com.
<a href="https://www.d2lodshop.com" rel="noopener noreferrer nofollow" class="giveMeEllipsisa" target="blank">D2lodshop</a>
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<a href="https://www.rhymbox.com" rel="noopener noreferrer nofollow" class="giveMeEllipsisa" target="blank">XMPP instant messaging</a>