Bitcoin Adresse are also easy to setup. Just use your wallet address or make it even easier for your apps and do it like this: Start with the keyword "bitcoin:" directly followed by your wallet id.
Width / Height: Setup the dimension of your QR Code. Please keep in mind: The more information you want to put into a QR Code the more complex it will become. So create bigger QR images for more complex text in order to keep the image readable for QR-Scanners.
Align: Left, Center or Right
Type: Text or vCard. If you choose vCard, you can enter name and address, phone number at home and at work, mobile phone number, email address and website url