Group Auto-Scale in UCSC genome browser

[Ramirez, Angie]

Dear UCSC Genome Browser Support Team,

I hope this message finds you well!

I'm reaching out to ask for assistance regarding an issue I'm having with the "Group Auto-Scale" feature in the UCSC Genome Browser. I'd like to use the feature to have all the tracks scaled against the track in the group with the highest maximum peak in the current window view. I have used the following sources to configure my trackhub file to set my tracks as "compositeTracks" in order to enable the "group-auto scale" option in the "Data view scaling" setting:

https://genome.ucsc.edu/goldenpath/help/hgWiggleTrackHelp.html

https://genome.ucsc.edu/goldenPath/help/trackDb/trackDbHub.html

https://www.biostars.org/p/222669/

Despite following these instructions, when I enable this setting and change the default display mode from "hidden" to "full" to view my tracks, I encounter an issue where the genome browser displays an empty window (screenshots attached), which as a result, prevents me from going back and reconfiguring my settings.

I would greatly appreciate any guidance or alternative methods to set up the trackhub file correctly to enable the "Group Auto-Scale" feature. Please let me know if you need any additional information or if there are specific configurations or examples that I should follow.  Below I have also provided an example of how my hub file is set-up:

hub example_hub 

shortLabel example_hub 

longLabel example Hub for UCSC Genome Browser Issue 

useOneFile on 

email exa...@example.com 

genome mm10

track groupTrack 

compositeTrack on 

type bigWig

track HF_rep1_coverage 

    parent groupTrack 

    type bigWig 

    shortLabel HF_rep1 

    longLabel HF_rep1 ATAC Coverage 

    bigDataUrl https://example.com/path/to/example_file1.bw 

    visibility full 

    color 26,0,153 

    autoScale off 

    maxHeightPixels 100:50:8 

    viewLimits 1:100 

    smoothingWindow 4 

    windowingFunction mean 

    configurable on

track HF_rep2_coverage 

    parent groupTrack 

    type bigWig 

    shortLabel HF_rep2 

    longLabel HF_rep2 ATAC Coverage 

    bigDataUrl https://example.com/path/to/example_file2.bw 

    visibility full 

    color 26,0,153 

    autoScale off 

    maxHeightPixels 100:50:8 

    viewLimits 1:100 

    smoothingWindow 4 

    windowingFunction mean 

    configurable on

Thank you for your time and assistance!

Best,

Angie Ramirez