Make walkEvery the zero mode, and have drawPath's panic name the head its tail descends from

hold.go

@@ -37,7 +37,7 @@ func readField(s *session, t *template, held *hold, sc renderScope, a arm) draw
 	if r, done := d.value[a.path]; done {
 		return r
 	}
-	r := renderLeaf(s, drawPath(t.head(a.key), a.tail, &d.pins, &pathDraws{s: s, held: d, a: &a}), sc)
+	r := renderLeaf(s, drawPath(t.head(a.key), a.tail, a.key, &d.pins, &pathDraws{s: s, held: d, a: &a}), sc)
 	if d.value == nil {
 		d.value = map[string]draw{}
 	}