So after making a sub-clip of a piece of media, and dragging it to the time line, I try to extend it. Nothing happens if I attempt to extend it both forewards and backwards. Why is this, and is there any way I can extend said sub-clip in the time line? Help, and thanks in advance.
Right click on the subclip in the project window. Use the edit subclip command to change the length of the clip.
The reason for a Subclip is usually because the editor only wants to work with a section of the media so the subclip is a reference to that.
Anyway...You can use the "Edit Subclip" from the Menu and all the options that gives you to do what you want