Simple Doubts of Beginner

I have the latest trial version 12.21

1st when I do search day that the folder is not indexed where active to index the folder and also not to index if I find that some folders do not need?

2º I would like that when closing and opening again it always opens with the directories of the saved tree and always showing me the last ones I accessed?

3º Would you also like all folders that I access to be saved so that when I log in again, it will show me all the tabs of the folders last accessed?

4th all my folders are to be displayed in a detailed way but the folders with images I want to put as a thumbnail how to make it to automatically save the display type of each folder?

For 2 and 3:

For 4 (go to your pictures folder):

Please ask one question per thread and include something about the question in the subject.