I am building a spreadsheet where the user is able to select via checkboxes different items. If the user checks the checkbox, I want that particular cell and it's data to appear in another column, along with all of the data from the other boxes that are checked. For example, if I have a list of items in A1:A10 (each with its own checkbox), if I check off A1, A3, A4, and A8, I want the data from that group of cells to appear in cells C1:C4. If I then check off A10, it will add it in C5. Any suggestions on how to start?