We have Custom Map Controls, that helps filter available markers. You can try map example here. Screenshot http://prnt.sc/e24of0
Will it suit your needs? If not, please provide a detailed desription of the result you want to get.
You can read about “Add markers on frontend” option in this article.
To add images follow the next steps:
– choose text editor
– click img button – screenshot http://prntscr.com/e31iho
– enter image link and click Ok – screenshot http://prntscr.com/e31m13
– then set other marker parameters and submit