In 2013 you were probably using Leaders instead of Mleaders. Leaders use the dimstyle settings; MLeaders have their own dialog box for setting them up. To use Leaders in 2019 type "Leader" at the command prompt.
To avoid all this confusion check into using Annotative scales for the text, dimensions and mleaders. See this >>Autodesk University video<< if you don't know how they work. Basically, you set the styles up for the finished plot size and let AutoCAD do the math.
You also might consider looking into having the titleblock in paper space at scale 1:1 and use a viewport for the model space elements that are also drawn at 1:1.
Nancy
@Anonymous wrote:
If I use MLD mleader, the arrow seems to be good. Why would there be such disparity between the two commands? (I just want the arrow and line, don't do a lot of dimensioning, thankfully)I guess I need to go back and change all my settings in dimension style setup. I will just copy what I had in 13 again, but that wasn't working right, before. (It did work in 13, just not in 19.)