in iMovie, does adding title at the start of a clip cuts the clip portion from there? I am trying to learn iMovie and I have a question. Does adding title at the start of a clip cuts the clip portion from there?

Scenario:
Let us assume that i have a 50 seconds clip and I want to display a 3 seconds title Before the actual clip starts. if i drag a title from the titles section of the iMovie to the start of the loaded clip, will the initial 3 seconds of my clip be removed or will the clip be extended   resulting a clip of 53 seconds (50+3) ?
If you put the title before the video and put the video after the title, it will extend the length.  If you put the title over the video, it will simply be placed over top of the first few seconds of video and the length will remain the same.