Period
On activating this menu command, the "Period Display" window opens up. This
window is used to define the period for which the weather station data should be
displayed. For quick selection, up to 8 predefined periods are available which
can be selected simply by clicking the mouse.
Period Forwards
If only a section of a period is displayed in the graphic, this function can be used
to shift the area displayed on the screen forwards to display a later time period.
Period Backwards
If only a section of a period is displayed in the graphic, this function can be used
to shift the area displayed on the screen backwards to display an earlier time
period.
Zoom Out Period
This function increases the period represented by the graphic and the values
table up to a maximum of the total period which can be displayed.
Zoom In Period
This function reduces the period represented by the graphic and the values ta-
ble.
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