Question: Global settings

hello,
I've been playing around a bit with mapel in the 14 day trial version and now I have a few questions
how can I set mapel so that results are always shown to me in SI format and the engineering representation and the results are automatically approximated, e.g. pi is calculated with 3.14...?
The configuration appears in the margin for individual solutions, but how do I set this globally so that I don't have to set it individually each time?

I also have to manually set the format of an input to input so that I can access the result when solving.

is there a reset button that is hidden so that I can go back to the basic settings? I must have changed something.

I hope you can help me

thanks for the help and sorry for my nob question, im reele new in Cas or other software like this

If it is the wrong tags or generally wrong here, please delete or move Thanks
Arthur