There are two aspects to using markers in FM. The first is defining what type of marker you want to use. FM has a number of pre-defined markers and you can create your own custom types. This (the marker definitions) is what you can import from one document to another (File > Import > Formats > Document Properties option).
You can then insert at any point in your content one of these marker types, however, the content of marker message at each location is up to you (i.e. FM will not import the content of the markers, only their definitions).
So you can create two custom marker types: one for the temporal event and on for the proof-reading. You will then need to insert these in each document at the desired locations with whatever annotations are appropriate at the point of insertion.
You can then use FM's generated lists to list the contents and the locations of these markers in a summary document.
That did it Arnis! Thanks!
That's what I wanted: I did create custom markers in one document and I wanted them to be replicated (not their content, just their type) in the other files. Copying the Document properties did that.
Thanks!