Could not turn off Submarine Auto build

[XthLegion]

Playing as the USA, I was in a war and had submarine technology.  I used the auto build submarine command, which worked as expected.  When the war was over and I wanted to stop auto build, I could not fully turn it off. I could set it as low as build 1 submarine per turn, but not zero submarines.  I went into save game file and zero'ed out the auto build to stop building unwanted submarines.  What am I missing on turning off auto build submarines on the game screen?

[seawolf]

The "X" button next to the autobuild display(below the almanac) clears it

[XthLegion]

Thanks for the information. All is well. :-)