I use existing markers a lot. In order to reach the positions of the respective markers faster, I would like to suggest 2 improvements:
- Switch the positions of the "Edit" button and the "Show on map" buttons:

Reason:
IMHO the "Edit" button is used less often. If the "Show on map" button is on the far left, it can be reached more quickly and precisely.
- Make the upper area of a marker entry clickable and assign the "Show on map" function to it.

Reason:
You don't have to hit the little "Show on map" button precisely, which speeds up navigation to the marker point considerably.