7i73 input 0-7 i cant'use

Hi everyone, I have a 7i96s and a 7i73, until now I have used the 3 analog inputs of the 7i73 (in 0,1,2,3- pin 3,4,5,6) to use them with 3 potentiometers but they are not stable and I have not continued to use them. I would like to understand if they can be used as standard inputs because I have to move 4 external buttons to recover the 6 encoder inputs for the potentiometers. My problem is that I see them as inputs in halshow but I can't use them, I can use from in8 up. I certainly wrote something in the HAL to enable the analog inputs but I haven't solved anything for 2 days to get them working as standard inputs again. It's been more than 1 year since I changed the hal file and being a beginner I don't remember... Can anyone help me? Thanks.

Inputs 0..7 on the 7I73 have no pullups/pulldowns
so these must be added externally if used with
single throw switches.

sorry but I'm not very expert, what do you mean by added externally? Can you explain it to me practically? Thank you

You would need to add an external resistor from 3.3V to each input (0 through 7)
connected to a switch, assuming the switch switches to ground (a 4.7K resistor is a reasonable value)

If the switch/button has NO and NC contacts you can do without the resistor, but a normal
SPST switch needs the resistors.

I use a momentary switch and will insert a 4.7 k ohm resistor. Thanks for your help!