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drawing the parts of the image, which shall be drawn transparently, with a certain color,<br />

which is not used elsewhere in the image.<br />

Diagram 52: Arranging an image<br />

In the first example displayed above the image is not drawn transparently. All parts of<br />

the image are visible in the preview. In the second example the white parts of the image<br />

are drawn transparently and remain invisible.<br />

2.9 Highlighting occupied track sections<br />

It is possible to assign a set of track elements to each indicator (see chapter 12, “ Indicators<br />

and Semi-Automatic Control”). These track elements are highlighted, when the indicator<br />

is turned on. In this way it is for example possible to highlight occupied track<br />

sections in the switchboard.<br />

67

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