Repeat markers are placed above the staff by default, and at the same positions as other system-attached items. 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.
You can move repeat markers graphically in Engrave mode, but this does not change the rhythmic positions to which they are attached.
You can change the default staff-relative placement of repeat markers in each layout independently.
In Dorico Elements, repeat markers are categorized as system-attached items. Therefore, repeat markers follow your per-layout settings for the visibility and positioning of system-attached items.