Hello everyone! Thanks for the help in advance and please pardon if this is not the right place to post my question.

I am editing a big file (a book of 450 pages). I was using the presettled editing and style formats at the Desing tab (Normal, Title 1, Title 2, etc...). However, I have the following doubts:

1- I want to change one format (for example, Title1) in the whole document. That is to say, I want to apply my change every time I already specified that something is edited as "Title 1". How can I do this? Changing the "Title 1" specifications does not work.

2-I want to change the format of the whole document except for the parts that I already specified in a different style (like Title 1, Title 2, etc...) How should I do this? I have tried changing the "normal" presettled editing style but this doesn't work and it does not apply to the document. Then, I also tried selecting the whole document and then changing the format, but then it also applies to the parts of the text that I already set to be other styles (like Title 1, Title 2, etc...)

Thanks in advance