It's nice to see that you're taking a shot at customizing. 1 lesson we have learned from creating screens is; Yes, it really does help to know how many rows you’re going to need before you start your screen. Get a good idea for the layout that you want to have. This will get you creating screens faster. Try creating screens like this and see if it improves. If it doesn't help, what objects are you using? Buttons, Text Box's, or Calendar?