Source Browser ?

1\environment columnsets-000
2
3\definecolumnset[example][n=4,page=left]
4
5\starttext
6
7\startbuffer
8\placefigure [tbrl]
9  {tblr}
10  {\externalfigure[fake][width=\columnsetspanwidth{1},lines=5]}
11\placefigure [fxtb:6*4]
12  {fxtb}
13  {\externalfigure[fake][width=\columnsetspanwidth{2},lines=5]}
14\placefigure [btlr]
15  {btlr}
16  {\externalfigure[fake][width=\columnsetspanwidth{2},lines=5]}
17\placefigure [btlr]
18  {btlr}
19  {\externalfigure[fake][width=\columnsetspanwidth{3},lines=5]}
20
21\dorecurse {5} {
22  \fakewords{100}{200}\par
23}
24\stopbuffer
25
26\startcolumnset[example]
27
28  \dorecurse{6}{\getbuffer}
29
30\stopcolumnset
31
32\stoptext
33