>>6500076Open it in photoshop. Double click on the layer to unlock it.
Ctrl+alt+C to open the 'change canvas size' box, chuck in the dimensions you want.
Grab the move tool, click on the edge of the picture to resize it, make its height 1080 up the top of the page. Drag it to the right a little. Click the tick up the top.
Select the areas that don't have background yet. Use content aware fill to populate them, then use either the spot healing tool or just a brush to fix problems you see.
ctrl+s.
Or, just ask one of us to do it for you!