Is there any way to have a modal "popup" form when you click a button? This form will have checkboxes, dropdowns, etc. for options that will be then transferred to the main form. Like, having a text box that displays the options selected once the popup form is closed.
Yes, there is. It's called a Dialog object, but it's quite complicated to develop... See the execDialog method of the app object for more information.
That is what I am looking for. But yeah, it's gonna take a while to develop. Each object has to be manually drawn. Thanks for your help!!