Apple’s own software, as well as apps produced by independent developers following Apple’s lead, are increasingly reliant on ellipsis buttons that have no clear meaning or consistent action.

If it's an image or video, tap it to open the detail view. If you want to select multiple files on your iPhone, tap the ...

Just look for the ellipsis “…” button at the top of your inbox, click on it, and turn off “Show Mail Categories.” You’ll also find this option under the “View” menu.

Tap the ellipsis button to display the Attachment View menu. From the popup menu displayed, select Attachment View->Set All to Small (or Set All to Large).

One way to get rid of the floating window is to convert it to split screen and then close it. Expert Tip: Note. If drag a ...