There are a few things you need before starting to create a contact sheet in Photoshop. First, you will need to create a new document, and then you will need to select the type of sheet that you want to create. You can choose between a standard contact sheet or an event sheet. Next, you will need to select the object that you want to use as your base. You can choose between a photo or an image file. Next, you will need to select the size of your contact sheet. You can choose between A4 or A3 size. Finally, you will need to select the color of your contact sheet. You can choose between black and white or any other color that you like. Now, it is time for the fun part! Once you have selected all of your objects and created your Sheet, click on the OK button and then click on the File menu and select Save As..