You can't include bleed and slug areas for on screen viewing in Publish Online. There is no an option to include a PDF (Print) file which I believe could include bleed and slug if you chose the proper PDF preset.
Publish Online does not include any slug or bleed. But the dashboard allows you to download a PDF.
You can use any preset to create any print pdf you want, select the PDF preset when you generate or actualize a dashboard and activate the possibility to download PDFs.