How do I hide the boxes on the left?
You can hide the icons using treeImageWidth and treeImageHeight properties:
dp.treeImageWidth = 0; dp.treeImageHeight = 0;
See also: https://api.daypilot.org/daypilot-scheduler-treeimageheight/ https://api.daypilot.org/daypilot-scheduler-treeimagewidth/