By the power of Claude I've added drawThumbnailMarkers and extended drawThumbnailRange to include sample start, loop crossfade, and release ranges.
This is quite a big PR in terms of number of lines of code changed. I started this before Christoph added the new workflow documentation so it hasn't been through that checking process.
Here's the PR. To pull this into your own fork:
Add Christoph's repo as a remote called upstream (if you haven't already) git remote add upstream https://github.com/christophhart/HISE.git
Run git fetch upstream pull/885/merge:pr-885-merge
Checkout the branch of your fork you want to merge to
Run git merge pr-885
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