Rin, a safer method of giving players control over where they'd like to travel (without risking a take over of your campaign) is creating an overmap image and using it as a handout in the Journal tab. If your players have permission to view the overmap handout, any player can pull it out to reference at any point in time without disrupting the game.
Or you can also create an overmap on its own page. If the players need to consult the map, you can load the page and the players can ping or circle with the pen tool where they'd like to go on the Tabletop. You can then load the desired location page that your players have chosen.