I2c lcd 16x2, message switch via button

I understand a little. but i am still confused with nth input. how to control IDX, if we want to move from X0 to X1 and so on? whether with a pulse node or another. sorry if my use of English is not good.

IDX from an count, or any other numerical output, the integer value will be taken.
example: 0,1,2,3,4,5,6 or 0.9=0, 1.6=1, 2.1=2…

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okay cesar. I will try it first.

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Maybe this could help you? I don’t know if that’s what you’re looking for exactly.