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Newsgroups: comp.graphics.apps.gnuplot
Date: Mon, 11 Jan 2021 17:19:10 -0800 (PST)
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Subject: Re: Select data points in interactive terminal
From: "jindi.li" <jindi.li@gmail.com>
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Xref: csiph.com comp.graphics.apps.gnuplot:4389

And I notice that "set mouse labels" must be set to make 
<Ctrl-B2> remove label close to pointer 
work, 
and also fix that when I zoom or rescale the plot graph, the pin annotation made with middle mouse click is disappear.