Now you can quickly correct perspective in a photograph with precision and control using the new Transform Panel, Guided Upright tool. and Offset sliders. Watch as Julieanne demonstrates how to manually position guides to automatically correct converging vertical and horizontal lines in images which can then be repositioned within the canvas area.
Here are some handy shortcuts know use while using the Guided Upright tool:
Shift + T will select the Guided Upright tool
“O” toggles the Loupe on and off (Located in the toolbar when the Guided Upright tool is selected)
“H” toggles the Grid overlay (Located in the toolbar when the Guided Upright tool is selected)
“A” toggles Tool overlay
Command + Option | Control + Alt -drag to reposition the image in the preview area via the Offset X/Y sliders. Add the Shift key to constrain to horizontal/vertical directions.
Click here for more information via the Lightroom Journal.