There are quite a lot of symbols that you need to master in order to read a reverse interlinear alignment. Each of the symbols is has a popup definition in the Libronix resource, so you won’t have to memorize what they mean, but understanding them in the first place will help you with reverse interlinear fluency.
Nearly all of these symbols are in the original language line; it was decided early on in the reverse interlinear design process that we would try to keep the translation text as uncluttered as possible. After all, it is the top line.
So, let’s take a look at those symbols, shall we?