Christine used PowerPoint to help her imagine the finished product. “In my head, the design worked, but making a collage is the easiest way to verify that,” she says. Here’s how she did it. Step 1: Christine took pictures of items she already had, imported them into the program and erased the backgrounds using a special tool. Step 2: Next, she searched online and copied and pasted images of the things she planned to buy (like the toilet and towel rack) directly into the document. Step 3: To build the background, Christine duplicated images of the wall and floor tiles. Visual perspective is important for a realistic effect.  Step 4: The final step involved arranging the images on the background. “It’s about 95 percent accurate to how the room turned out,” she says.