Repeat markers are placed above the staff by default, and at the same positions as other system objects. Coda sections are separated from the preceding music by a gap in the system.
You can move repeat markers to different rhythmic positions in Write mode. They are positioned by default according to your settings in Engraving Options.
You can move repeat markers graphically in Engrave mode, but this does not change the rhythmic positions to which they are attached. You can adjust the size of individual mid-system gaps before codas by adjusting the note spacing at their rhythmic positions in Engrave mode.
You can change the default positions of all repeat markers project-wide, set values for the minimum distances between repeat markers and staves and other items, and set the default gap preceding coda sections on the Repeat Markers page in Engraving Options. Dorico Pro uses the same gap size before the start of codas whether they occur partway through systems or at the start of a new system.
You can change the default staff-relative placement of repeat markers in each layout independently in the Repeat Markers section of the Staves and Systems page in Layout Options.
Repeat markers are categorized as system objects in Dorico Pro, which you can show above the first bracket of selected instrument families. You can change the instrument families above which system objects appear in each layout independently; for example, if you want repeat markers to appear at multiple vertical positions in each system in the full score only.