How to Use Smart Trim for Your DSLR Film
Select the trim sections.
Double-click the clip to select all the area you can trim in a single clip. You can also select sections in multiple clips by dragging the marquee over the desired clips and right-clicking or Ctrl+clicking (Option+clicking on the Mac) the trim sections. You’ll see the selected trim sections are highlighted. When you select a section, all trimable sections turn into blue-striped sections.