You can find options for the appearance and placement of articulations project-wide on the Articulations page in Engraving Options.
The options on this page allow you to change the positions of articulations in detail, including whether different articulations are shown above the staff or by the notehead, the positions of articulations relative to ties and slurs, and the vertical gaps between articulations and notes/other articulations.
There are musical examples for many options to demonstrate how they affect the appearance of your music.