LightningChart Support Forums

Posted: **Wed Apr 17, 2013 9:36 am**

I've added SeriesEventMarkers and ChartEventMarkers in the chart. They work correctly, but when I pan the view so that the markers go under X axis minimum, and then pan back to original position, I don't see the markers anymore.

: Marker in position; MarkerDisappear1.jpg (73.73 KiB) Viewed 9392 times

: Panned left; MarkerDisappear2.jpg (63.39 KiB) Viewed 9392 times

: Panned back to right, marker has disappeared; MarkerDisappear3.jpg (72.24 KiB) Viewed 9392 times

How to fix this?

Posted: **Wed Apr 17, 2013 10:20 am**

LightningChart has automatic destruction of out-scrolled data and markers. The chart deletes the marker in this case, when it goes under X axis minimum.
To fix that, set ViewXY.DropOldEventMarkers = False.

In v.5.1 and above, DropOldEventMarkers = True by default. In older versions, it is False by default.

LightningChart Support Forums

Markers disappear when panning the XY view

Markers disappear when panning the XY view

Re: Markers disappear when panning the XY view