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    Oh - the old "uses" issue... "psCircle" is declared in unit TATypes
    which is not added to "uses" automatically at runtime.<br>
    <br>
    At designtime, just use the ObjectInspector: The tree above the
    Object Inspector shows the chart and the series as a child of the
    chart. Click on the series to brings the series properties into the
    Object Inspector. Scroll down a bit to see the "Pointer" property,
    open the node and find the "Style".<br>
    <br>
    Maybe you are interested also in my forum posting of today
    containing a lot of TAChart runtime code:
<a class="moz-txt-link-freetext" href="http://forum.lazarus.freepascal.org/index.php/topic,28628.msg179298.html#msg179298">http://forum.lazarus.freepascal.org/index.php/topic,28628.msg179298.html#msg179298</a><br>
    <br>
    <div class="moz-cite-prefix">Am 03.06.2015 um 22:38 schrieb Richard
      Mace:<br>
    </div>
    <blockquote
cite="mid:CAK+KT386PC9h3TXXvi9Db7wBh_G_YmaZSUB+LCPNYNRCndL6Wg@mail.gmail.com"
      type="cite">
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          <div class="gmail_quote">On 3 June 2015 at 17:49, Werner
            Pamler <span dir="ltr"><<a moz-do-not-send="true"
                href="mailto:werner.pamler@freenet.de" target="_blank"
                onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=werner.pamler@freenet.de&cc=&bcc=&su=&body=','_blank');return
                false;">werner.pamler@freenet.de</a>></span> wrote:<br>
            <blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">I
              suppose you use a TLineSeries, but the same principle
              should work for TBSplineSeries and TCubicSplineSeries<br>
              <br>
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              Chart1LineSeries1.Pointer.Style := psCircle;         //
              round points<br>
              Chart1LineSeries1.Pointer.Pen.Style := psClear;    // no
              border<br>
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              <div class="gmail_default"
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                Thanks Werner.</div>
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              <div class="gmail_default"
                style="font-family:arial,helvetica,sans-serif;display:inline">That's
                interesting,</div>
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                <div class="gmail_default" style="display:inline">  ​</div>
                <span style="font-family:arial,sans-serif">Chart1LineSeries1.Pointer.Styl</span><span
                  style="font-family:arial,sans-serif">e := psCircle;  
                    </span><br>
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              <div class="gmail_default"
                style="font-family:arial,helvetica,sans-serif;display:inline"><span
                  style="font-family:arial,sans-serif">Doesn't compile,
                  but I can navigate to it at design time?</span></div>
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                </span></div>
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            <div>
              <div class="gmail_default" style="display:inline">
                <div style="">  chartMain.ClearSeries;</div>
                <div style="">  FLine := TLineSeries.Create(chartMain);</div>
                <div style="">  FLine.Marks.Style :=
                  TSeriesMarksStyle(4);</div>
                <div style="">  FLine.Marks.OverlapPolicy :=
                  opHideNeighbour;</div>
                <div style="">  FLine.ShowLines := true;</div>
                <div style="">  FLine.ShowPoints := true;</div>
                <div style="">  FLine.Pointer.Brush.Color := clBlue;</div>
                <div style="">  FLine.Pointer.Style := psCircle;
                  <---- this line won't compile</div>
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                <div style="">Richard</div>
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                  style="font-family:arial,sans-serif"><br>
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              <div class="gmail_default"
                style="font-family:arial,helvetica,sans-serif;display:inline">​</div>
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