Can Default Settings Be Changed?

I just had one question regarding two ongoing issues. Having learned previously that the typewriter scrolling function was creating an issue with highlighting, I’ve started making sure during each session I’ve unchecked it. I now find I cannot turn it off permanently until it’s needed again. Also, when selecting the option to show “invisibles,” it has to be reset everytime i flip between text folders. Even though the option for invisibles remains checked, it has to be unchecked then rechecked for the feature to be visible again in the text I’m working on. FYI, I’m using WinXP.