This video covers how to use the Revit equal to AutoCAD's Fillet Radius. Revit uses trim to corner instead of fillet. So to use the autocad fillet radius in Revit, we need to use different command option.
Thanks for the tip. Wouldn't it have been great if Revit would have been made by AutoDesk from the start. At least for us, old CAD guys switching to Revit. I like how you explain things and relate to CAD, because for us our brains have worked for so long with CAD commands, it helps to translate from CAD to Revit.
Check your view range. Chances are, you are cutting above your walls. View range is located in the properties dialog. I have a video that explains view range that may help. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-O-l5fYFSfSs.html
The audio on this was even worse than some of your others. Your content is typically good - you should really re-record these using a better microphone (or whatever the problem is.)