Replacing one set of blocks with another

Hi - just learning to use blocks. Lets say I have an array of 9 block instances - all the same, in a grid.
Can I replace them with another block instance?

I would like to be able to hit one (or two) buttons to make this happen…

Also - important to note that the form will be completely different - I am not interested in changing a block slightly and losing the original. I want to have easy interchangeability between circles, triangles, squares, etc…

Hi @ShaunK, you might try the _ReplaceBlock command.

c.

EXCELLENT THANK YOU

exactly what I was looking for