Changing Top Surface Texture

[galaxybeing]

I have a Neptune 4 Max, but this question could just as well pertain to my Ender 3, as I believe it's more of a slicer setting I don't know of, or may not even exist. I'm posting a JPEG of a speaker grill I designed in Freecad. When it prints, there seems to be no sense as to how the print head moves. It'll do a few triangles here, then skip to some other spot and print a few there. and by the time the top layer is finished, the surface texture of the finished part looks awful. I'm trying to avoid sanding and painting. Is there a slicer setting that makes the print head just print one entire straight line at a time, starting on one end, going all the way across, then doing the next line below it, and so on? Thank you.