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1\environment back-0
2
3\setupindenting[big]
4
5\definecolumnset[two][n=3]
6\definecolumnsetspan[test]
7
8\definetextbackground[test]
9  [background=color,
10   backgroundcolor=gray]
11
12\definetextbackground[more]
13  [background=color,
14   backgroundcolor=lightgray,
15   alternative=1,rulethickness=2pt]
16
17\dontcomplain
18
19\starttext
20
21\startcolumnset[two]
22
23  \startcolumnsetspan[test]
24    \input tufte
25  \stopcolumnsetspan
26
27  \starttextbackground[test]
28
29  \input tufte \par
30
31  \startnarrower
32
33    \starttextbackground[more]
34
35    \input tufte \par
36    \input tufte \par
37    \input tufte \par
38    \input tufte \par
39    \input tufte \par
40    \input tufte
41
42    \stoptextbackground
43
44  \stopnarrower
45
46  \stoptextbackground
47
48  \input tufte
49
50  \starttextbackground[more] \input tufte \stoptextbackground
51
52  \starttextbackground[test] \input tufte \stoptextbackground
53
54  \starttextbackground[more] \input tufte \stoptextbackground
55
56\stopcolumnset
57
58\stoptext
59