This document summarizes the changes to the UCSC Genome Browser Hub TrackDb specification.
| Date | Track Types | Link to Doc | Change |
|---|---|---|---|
| 2026-03-09 | bigBed | faceted composite | An alternate UI for composite tracks with a very large number of subtracks. |
| 2026-01-12 | bigBed | style | Activates the positional heatmap display mode for a track that meets the schema. |
| 2026-01-11 | hic | hicArcLimit | Limit the number of arcs displayed in a Hi-C plot, favoring those with the highest scores |
| 2025-03-31 | interact, bigInteract | detailBoxesEnabled | Used to suppress the link/boxes in interact tracks that would go to a details page. |
| 2025-03-06 | hic | bigDataUrl | Added hic to the list of supported file types for bigDataUrl. |
| 2024-06-11 | bigBed, bigGenePred, bigChain, bigPsl | highlightValues.* | Allow user to highlight certain features in yellow, if they contain certain values in an extraField |
| 2024-01-22 | bigWig | setColorWith | Color a signal plot from a bigWig file by the ranges in a bigBed file |
| 2023-11-08 | bigBed, bigGenePred, bigChain, bigPsl | decorator.* | Semi-transparently overlay annotations, e.g. protein domains on transcripts, mutations on exons, or summits on chip-seq peaks |
| 2023-10-16 | bigGenePred, bigChain, bigPsl | mouseOver, mouseOverField | mouseOver works for all bigBed-based file formats |
| 2023-06-27 | all | maxItems | Change: maxItems, increased default to 10,000, 10x more items can be shown. |
| 2023-04-04 | all | downloadUrl | New: downloadUrl <fileType> <URL> Shows a link where user can download a file. On the UCSC browser, the link is shown above the description page. Right now this is used for GFF files on gene tracks. |
| 2022-09-30 | bigBed, BAM | doWiggle | New: doWiggle on Instead of showing the features, show coverage of features, as a 'wiggle' (signal) style track. Can be switched off by the user on the track config page. |
| 2022-09-22 | bigGenePred | colorByStrand | Change: colorByStrand can now be used by bigGenePred-type tracks. |
| 2022-06-30 | bigPsl, bigChain | otherTwoBitUrl | New: otherTwoBitUrl <URL> This statement allows one to store query sequences in a separate twoBit file rather than in the annotation file itself, which can reduce the size of the annotation file. |
| 2022-05-14 | bigWig | logo | New: logo on Motif logo of the genome sequence, as a "dynseq" display, see the example. |
| 2022-05-05 | bigMaf, maf | logoMaf | New: logoMaf on Motif logo on MAF/bigMaf alignment tracks. Zooming in on alignment shows nucleotides scaled by phyloP conservation. |
| 2019-05 | all | useOneFile | useOneFile on Adding the 'useOneFile on' line to the hub.txt section of a hub allows the contents of all three files to be referenced inside of one file. |