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### 10.7.1 Specifying vertical position

As described above vertical positions are specified as a numeric value [0..n] where 'n' is an arbitrary constant. (For practical purposes n is most likely < 100)

Using our previous example we will illustrate this parameter by changing the position of our 'Project' activity to position 7. Therefor we change the call to GanttBar() to

`$activity = new GanttBar( 7,"Project","2001-12-21" ,"2002-02-20" );`

and we then get the chart as shown below in Figure 146.

Figure 146: Changing the vertical position to 7 [src]

Note that the height of each position (vertical position) will depend on the actual height of the bar.

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