Click on <b>"Add"</b> button to create a new vector.
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This enters automatically in the edit mode.
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Click on <b>"Edit"</b> button to edit the selected vector.
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In edit mode, you need to select vector components by clicking on the source grid columns (see @@grid@@).
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Press ESC key to cancel the edit mode.
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Click on <b>"Remove"</b> button to delete the selected vector.