Effects in Lightroom can change the appearance surrounding a photograph by creating an outside border. This is helpful when desiring the main subject to stand out. Oval and rectangular shapes are available to create special borders around a photograph.
Here is a link to five free Lightroom Effects Presets that I created yesterday. The thumbnails show a small version of the finished product. Download these effects and give them a try today.
Directions can be found at the bottom of the web page on how to download and use these files.