Hi gia - you can use the Enter key to commit just a single value that you are currently typing in.

Tab will do a "commit + move focus to the next field".

I'm sorry but I do not have any built in method to replace the Tab key function with a different key - it is normally a standard procedure in Windows to use the Tab key for moving between fields like this.

But I am pretty sure you can find some Windows system utility programs that would allow you to make a different key of your choice to emulate the Tab key to any Windows program... Try searching for something like "keyboard remapper". Here is one that I found, I did not try it myself though: http://webpages.charter.net/krumsick/

- Michael