Select multiple files
You can select multiple files to edit in the timeline. Hold down the CTRL key and click the left mouse button to select all files you need. The selected files will be highlighted.
Group/upgroup multiple files
Group means to put multiple files into one group to edit.
How to group: hold down the CTRL + left mouse button to select files, right click on the selected files and select "Group" to put the selected materials into a group.
How to ungroup: select files that are grouped, right click and select “Cancel Group”.
Edit grouped files
Move the grouped files in the timeline: click one of the grouped file, and other files in the grouped will be selected as well; move the files to any location you like in the timeline.
Copy and paste grouped files: select the grouped files and right click, select "copy". Then move the cursor to where you want to paste the files into, right click the mouse button on a track, and select "paste" to copy and paste the grouped files.
Clip the grouped files: move the cursor to where you want to clip in the timeline, select the group, and click "Clip" to cut the grouped files all together at the same time.
Delete grouped files: select a group of files, click the "delete" button in the editing bar, or right click and select "Delete Edit" to remove the group of files.