Help with a Transit Calendar

I need help with a Transit Calendar please,

I am not sure what the small designations on the lines that show up as "sr" or "sd" mean?

At this point I''m trying to put the sheets together and follow what's happening, learning definitions along the way and such, but the sr's and sd's aren't accounted for and are tripping me up

Using info/tips I've read here, I'm looking for info relating to an inheritance I've been told of from two different sources. I see Pluto and Jupiter coming around quite a bit, which I why I am interested in getting all of the definitions correct on this chart.

Thanks for the assist!

S means stationary, SR means stationary turning retrograde, and SD means stationary turning direct.

Ahhh, now it makes sense! Thank you Frank. The more I get into this, the more utterly fascinating it is. And the less "other" stuff I get done...lol.

Oh well, what good does a clean house do anyway? hehe...