Hi, and welcome to the forum,
Unfortunately your post does not comply with Rule 3 of our Forum RULES. Use code tags around code. Posting code without them makes your code hard to read and difficult to be copied for testing. Highlight your code and click the # at the top of your post window. For more information about these and other tags, found here
Since this is your first post, on this occasion I'll change it for you, but please note for the future.
All the sheet events, like the Selection_Change events you mention are 'inbuilt'. i.e. they're not macro code which you can treat like any other procedure you want to write. There is only one Selection_Change event and therefore you need to include all your code within the single procedure.
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