Do I need to inform immigration about my re-entry permit when leaving and re-entering Thailand?

hi everybody

i just got the re-entry permit to keep my non-o 90 days " alive ".

want to ask :

1) when i leave thailand do i need to tell the immigration officer who stamp the depature stamp that i have an re-entry permit or they will know from their computer system ?

2) if i enter back to thailand do i need to tell the immigration officer that i have an re-entry permit so that they will stamp the " 1st duration depature date that i enter on my non-o " or they can see from their computer system and stamp back the same depature that i use to enter on my on non-o first day ?

thanks