UDP Bandmap Highlight Worked Before

Art - VE3UTT / W1AJT

Is there any way to highlight a station worked before in the UDP bandmap other than the "X" that appears next to the call sign?  For FT modes it would enable quicker identification of stations worked before.  I know the grids can be highlighted for various characteristics and that works well.

Thanks & 73,
Art - W1AJT / VE3UTT

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