To add a button to your spreadsheet you need to go to the developer tab, if you do not have this please check out our older post on how to show the developer tab. Once you’re on the developer tab you need to find the insert button it looks like a briefcase with tools in front of it. If you click on it, it will bring down a menu which have loads of useful buttons and things you could use in your spreadsheet. We want to select the first button in the list.
You could attend a Excel VBA course which will teach this and more in a lot more detail.