Here’s an easy 15 second way to recrop a photo in Adobe Lightroom when you want to change a Landscape into a Portrait or vice versa.

STEP 1
From the Library or Develop view, Press ‘R’ to activate crop mode

STEP 2
Press ‘X’ to change the crop aspect ration from portrait to landscape or landscape to portrait.

STEP 3
Press ‘Enter’ to commit the crop.

STEP 4
Export your file.

STEP 5 (optional)
You may want to reset it back to original after.  Just press the ‘Reset’ button so the original aspect ratio shows in the library.