I have many images to be used in a vacation video.
I would like to use the Slideshow creator to help speed up the process.
This is a great tool and I like how it adds a white border around the pictures in the Collage theme.
I am planning to insert some images with my own motions between segments created by the Slideshow creator.
Of course this will look much better if I can place the same border around my image as that used in the Slideshows.
In the PIP tool, I can place a white border around my image but it is always rounded at the corners.
I would like to have multiple images on the screen at the same time.
Is there some other method to place a consistent border around an image that has square corners?

In addition, I am wondering how I might add a more elaborate border as the Slideshow creator does in the various themes?