None of the usual tricks worked for taking a screen shot on the Nexus7, but it turns out to be:
Press both the ‘down volume’ button and power button simultaneously for about a second.
In case useful:
– on my HTC Android phones it us usually: hold power button + soft ‘home’ button
– Asus Transformer (TF101) long hold the ‘running apps’ soft key.
Fragmentation, what fragmentation!