In the previous version you could add items to the timeline. How can you do that in the new version???
I am wondering why protestant baptisms of my swiss relatives go to Other infornation rather than to the Christening catagory?
Adding items to the timeline hasn't changed at all: you enter the conclusion on the profile's Details page, exactly as before. On the Timeline, you can control which types of conclusions are shown by clicking "Show" and choosing the desired items.
The christening-versus-baptism question has been around longer than the current, dozen-year-old iteration of Family Tree. On FamilySearch's various discussion boards over the years, users like us have spent many, many pixels trying to explain to The Powers That Be that the English language is unique in having two different words for this sacrament, and that therefore the distinction that some people try to make simply Does Not Exist. Unfortunately, none of the right people appear to have seen any of those pixels, so baptisms/christenings continue to be filed according to the random choice of translation applied to the particular indexed collection: if the index happened to label the field as a "christening", Source Linker offers to put it under Vitals, while if the index happened to label the field as "baptism", Source Linker offers to put it under Other Information.
(And if it's a legacy profile from a previous system, with that index-based christening already added, then you end up with the same thing in two places, because Source Linker doesn't show the christening when it offers the baptism. It's especially fun if I set the interface to Hungarian, because of course there's just one word, so Source Linker's actions are inexplicable: it offers to do X, and says it did X, but it actually does Y.)0
Don't forget that items only show on the timeline if they have a date.
If you have added information on the Detail page and those items do not have a date, they will not appear on the timeline.0