2 Mar 18, 2018 14:39
You don't say which version or skin you are using, which would be helpful, if not essential. You could also show a screen shot of what you want even if it is an edited image where you added text.
Text (a sub-title) can be added to the post with a class and placed and format as you like.
You may like to see a similar query I made some time ago
It is possible to hack the code so that you are presented with an extra input when you go to create a new post, but whether that is a feature to be at the core is another matter?? This would require an addition to the database to store the info. I think the only place formatting is stored is in the post data, so I'm not sure there will be a lot of support to make a new table with 'formatted' entries. The problem is that multiple formats maybe required as people may want for colours, different fonts etc. It would be like a mini post, a whole new feature.
The restriction on the 'Title' can be relaxed as explained in reply #4 in the link above, but this only allows bold text. You will have to further modify to allow a break, which will no doubt make other alignments necessary if you want the date etc to be place specifically.