Lightroom

How to resize in Lightroom

1.  In Develop mode - top right corner

2.  Go to File / Export - top left menu.

3. Export to desktop.

4.  Still in the Export Menu.

Scroll down to File Settings,  Image format is JPEG, Colour space is Srgb at 100%

Width 1400 and Height 1050 - no matter what the orientation of your image is.

Finally, click Export.

5. Go to Desktop.

Click on the Lightroom file icon, your picture will be resized.