You can add files to favorites. This command, on a button or hotkey, will add the selected file to favorites:
Favorites ADD PATH={filepath}
Selecting the file it the list would then navigate to the folder it is in and select it.
If you want to open the file, not navigate to where it is, just drag the file to a toolbar or menu while in Customize mode and Opus will create a button which opens it.
OK, I have the ```
Favorites ADD PATH={filepath}
new button set up, and I have been able to add files.
However, what is displayed in the favorites folder on the left side of the folder hierarchy is different from the files that I have added. See screen shot, and please explain why these to elements aren't syncing
Either turn off Preferences / Favorites and Recent / SmartFavorites / Enable SmartFavorites system to disable them entirely, or turn off Preferences / Folder Tree / Contents / SmartFavorites to hide them from the tree.
I'm not sure files in the favorites list will show up in the folder tree. The folder tree is for picking folders. But they'll appear in the Favorites menu, which you can open (by default) via the icon next left of the path field.