Select, Text, Highlight, Draw, Sign — labelled, in that order, at the head
of the toolbar. Each one leads a kit rather than hiding it: the shapes sit
behind Draw, underline and strike-through behind Highlight, and nothing is
offered twice.
Draw arms the pen, which is what Draw means when there is one button for
it. The names drop out below 1180px, where five of them would start
pushing the zoom and colour controls off the end.
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