When you uncheck labels in one chart and you close it, the next chart that will open keeps the same check/uncheck choices.
This is not optimal, since it can send an erroneous message leaving the user believing that the previoulsy uncheck labels are not surveyed for the following stations. Moreover, considering you cannot see the uncheck labels until you click on the drop down menu.
Example:
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Uncheck 7Be for the Whitehorse station

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Close the Whitehorse chart
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Click on the Winnipeg station and the 7Be is not displayed. Opening the label drop down menu shows that the 7Be is already unchecked

Could it be possible that these options be reset when closing a chart?