helgasoft

[hideOverlap](https://echarts.apache.org/en/option.html#xAxis.axisLabel.hideOverlap) will remedy the problem to some extent.

yes, a bug. If you really want the hover text up, a workaround is to place _saveAsImage_ **first** in _feature_ - [Demo Code](https://echarts.apache.org/examples/en/editor.html?c=line-simple&code=PYBwLglsB2AEC8sDeAoWsAeBBDEDOAXMmurGAJ4gCmRA5AMYCGYVA5sAE7m0A0J6AE2aMiAbVoBZGL1i0AKgFcqM2gHUqAlXIAWClQDEOEFQGVmphdFoBdEgF8-6cjnxFUpMpRqyAbowA2SrT2jrB4VEZUhLCi_MQegsJiAIwArAAMPLAATADMmTnZACxZ2ckAHFnJualVRQDspQBs6dahHhTUdP4Q0MpxdiRtJGDAwP4ARsAYbnF42sAA7kRgHErtZKBEyU0bAGZUzAoc3u4JeIw-VFh4AJIAtoyspw5x6I-sEPRyXm6eXTFaD0-ioJowODZYK8ErAhGBGAA1CBUZbxGGwE6MAQAeWg_nIRD2AXCGw8_kY0FYYlocMYsCRKJUAGF_MBwioAEpUPYneY2N5Q0kYqKjE5_aGkCXoKj3EDaRh4VxojxfGAmCj-U4C9AsDBgAAKbIgkBgdFGIGCMMGHilGIgrG0YDoOxAGF4cWNMpMEAAXt5kul7Cg7ABuIA)

_contextmenu_ event does not exist in ECharts, but zRender has it - [Demo](https://echarts.apache.org/examples/en/editor.html?c=line-simple&code=PYBwLglsB2AEC8sDeAoWtJgDYFMBcSYOAHmHgOQDGMRpAtjtAK7kC-ANGrMQILEQBnPMi7oAJgEMwE4QG1yAWRjl2scgBUmOFWoDqOMTo0ALFqvIAxAE4QjAZSn2m0cgF0uHLgE8-g4UlhPdAEcGxwhWFlREXRY2ElpOQBGAFYABlUAJgBmDNhMzIAWLKSADlUk7JSKwoB2LIA2NNdOOPQwLxB8NSwIaG1VAS86ACNgLDsIAC9uzJTo1i53VgBuFBRKYwkrMARkELAAeXAoaGEACmIASgQAPmRWVZQ6LwBhLZ2AOgBzHDAALSs5yunxg5yoNBIYAYzB0sHOIBu8HuqFi1GgAnGOE-WGA33OACIbN9jLtKL1KABrAwEq4oVhXFZAA)

3D points [1.0,0.1,1.5],[ 1.0,0.5,1.5],[1.0,0.6,1.5],[1.0,0.8,1.5],[1.0,0.9,1.5],[1.0,1.0,1.5] represent a 3D line which could be safely drawn with first and last points only [1.0,0.1,1.5], [1.0,1.0,1.5]. Same goes for the second line - [1.0,0.1,2.0], [1.0,1.0,2.0]....

[official example](https://echarts.apache.org/examples/en/editor.html?c=scatter-large) has ```large:true``` and works fine. Any reason why you want to disable optimization with _large_ ?

ok, agree, related to #17079 and #9945 BTW all points seem to be showing (tooltip present), but some are not highlighted.

> 5. progressive re-rendering takes place Looks like disabling _progressive_ thru _progressiveThreshold_ fixes the zoom problem - [Demo](https://echarts.apache.org/examples/en/editor.html?c=scatter-large&code=GYVwdgxgLglg9mABAcwKZgCIEMpYBQA26ANInMMAM6pQCUiA3gFCKJFSJYBOXiAvIjCoA7ogBiBODgDMAJgCCPLAE9C6RACpEs2gG4WbGmQr9EABn2tgcXmo4xTFxA4A8hsLucBqL_WatWdkQAD1MvAFkcAAsAOi4sMAATOABbPHotAEYLA0CjZX5cgIjomMoYMDxg-gBaItZQrTUkAFJtRAB-cxjMxAAuRBqzHozESKhY-KTU9MQvesQ8ciojAB9V83oAekRsywDuLgBtZZ8AXVNg_dZDk4pz02V9gF8DLhoQLiRD_VfygC9UKYAKyoaT6CAISgcRI4LC9ARoTBwvAA1B6JhwAAOsAQpn8iFgUCIAwJrCgqGCUD6C1QECi3CglBi1i4KRwMSwiUSAGFUuzKHhYbhMjEiGBkBNEDsdHNEAByRAABTgFSZ8oMz2IBigcDgBFgWNJWp1eoIACM4MFSUUiMBqQqIOgKVx5dqAohgKgcJ9UDaPaxhVgAFp6lLGoqvVgmhryYIwSjG92IZRxhNJgzmrggShRDOBuGh1IDI5FMkBKDKLF-hUVcqJVAaj1RxBnZMJGDs3FgAbALAEajJ6hcGCoROIUse8usMBYFI1-XyN0LSvVgbyygQHAu5cBxBBgZBzLJj2JTvocpQkvy4JuhXKeVthaUZQpS0EADKMEBA2kJ4CMAUikH6ViSjALKw2JYBAgHKAMwwACwLDGAZYlwcDIO8lDlAAbqgAAqURYVE-qJAMaJeJkkYGGcTDPPoTApMoPIMlwUAxAgeDylmOZRNQRDQKgiR3ngWL0HwAB84GsPxphYjE5o4PSRxmBcXTyYpUDKapZSoAJFKJCpZwxEGACSSSUv0CryvsTEsYyulQAA8ji8CVAwiBFESJIMBSVJ9Buel0gZAVePxYroJKUQts8GKxUAA). > So basically there is no option to brushselect on large amount...

> ...if you move the selection area even just a little, all the points are immediately selected correctly. @DespotMagic, frankly I cannot reproduce your findings. What would be helpful is...

Thank you for the detailed explanation. Just step 4 might be better defined as "zoom with mouse scroll wheel". Indeed the selection area drag is able to refresh its content...

On reflection and looking from a different perspective - **zoom and brush seem to be completely unrelated** actions in ECharts. As seen in the example, selected area size does not...