I would like to change the title or the sort title for one of the profiles in my collection to my personal preferences instead of what is stored on the online service. How can I do that?
You cannot change the title or sort title on the general profile as this profile is shared between all useres, but you can overwrite them with a personal title or sort title, which when present will be used instead of these.
On My Movies for iPhone, iPad or Android, you can add this by pressing the "Show More" in the "Personal Data" area of the movie details page, and change the "Title" and "Sort Title" to what you prefer.
In My Movies for Windows Phone, you can open the menu from the movie details page, and select "Edit Personal Data", and change the "Title" and "Sort Title" to what you prefer.
In My Movies for Mac OS X, you can add this by clicking the "Personal" tab of the title editor and change the "Title" and "Sort Title" to what you prefer.
In My Movies Collection Management for Windows, you can click the "Personal Data" editing button in the bottom of the title editing screen, and change "Title" and "Sort Title" to what you prefer.
The personal title and sort title are synchronized to the online servers for your collection, which means that it will transfer between all the devices where you are using your My Movies user account, and therefore act as global change for your collection.
When using My Movies, titles added to your collection, with the exception of titles created manually are profiles shared between all users of the online service - this ensures that your profiles are always kept up to date with the latest data, and this method is also what allows you to use your collection on multiple devices and automatically synchronize data between clients.
This also means that data changes on the global profile affects not only yourself, but all users having the same title in their collection, which is why you cannot change the data on the profiles from the mobile devices, and why changes contributed from the Windows or Mac software strictly must follow the contribution guidelines.
How the titles are sorted, and how the movie title is presented can however be preferred individually by each user, where some users prefers to refer to the "James Bond / 007" movies as "James Bond: Quantom of Solance", others as "007: Quantom of Solance" and some only as "Quantom of Solance", therefore you can overwrite the title and sort title with the personal titles like this.
We believe that with that the exception of titles, the data on a retail title is not something that users should have personal preferences over - either the data is correct, or the data is incorrect. If the data is incorrect, it should be corrected on the global profile, and not only on the profile in your collection, which is why you can report incorrect data to our moderators, or contribute changes to the profiles in My Movies for Mac OS X or My Movies Collection Management for Windows, either to correct incorrect data, or to improve the data on the profile in general.