If you want to blur background in Lightroom, there are a few different ways to go about it. The first way is to use the Background Removal tool. To do this, open the Background Removal tool by clicking on the gear icon in the toolbar and selecting it. Next, select the area of background you want to remove and click on the button that looks like a crosshair. This will start removing the background from around the selected area. If you want to remove more than one area of background at once, just select multiple areas with your cursor and click on the button again. The second way to blur background in Lightroom is to use the Blur tool. To do this, open the Blur tool by clicking on the gear icon in the toolbar and selecting it. Next, select the area of background you want to blur and click on the button that looks like a crosshair. This will start blurring out all of the surrounding areas. If you want to blur out more than one area at once, just select multiple areas with your cursor and click on the button again. ..