I'm trying to display a SharePoint Online page "bare" with no side navigation, ribbons, or any other SP decorations. I don't want my visitors to have to worry about SP at all--to them it's just a web page.
I found the idslg=1 parameter. Adding that to my pages (as opposed to built-in views) has one of two effects: none at all (the page looks exactly the same), or the error, "Sorry, something went wrong An unexpected error has occurred." (Are there expected errors?)
Does isdlg not work on user-defined pages? Or is there some trick I haven't figured out? Thanks.