Nowadays, Augmented Reality (AR) is available on almost all smartphones creating some exciting interaction opportunities but also challenges. For example, already after the famous AR app Pokemon GO was released in July 2016, numerous accidents related to the use of the app were reported by users. At the same time, the spread of AR can be noticed in the tourism industry, enabling tourists to explore their surroundings in new ways but also exposing them to safety issues. This preliminary study explores users' sense of safety when manipulating the amount and UI elements visualization parameters of Point of Interest (POI) markers in a developed AR application. The results show that the amount of POI markers that are displayed is significant for participants' sense of safety. The influence of manipulating UI elements in terms of transparency, color, and size cannot be proven. Nevertheless, most tested people stated that manipulating transparency and size somehow influences their sense of safety, so a closer look at them should be taken in future studies.

翻译：如今，增强现实（AR）几乎已在所有智能手机上实现，这既创造了令人兴奋的交互机会，也带来了挑战。例如，自2016年7月著名的AR应用Pokémon GO发布后，用户已报告了大量与该应用使用相关的事故。同时，AR在旅游业中的普及也引人注目，它使游客能够以新方式探索周围环境，但也使其面临安全问题。这项初步研究探讨了用户在一款开发的AR应用中操纵兴趣点（POI）标记的数量和UI元素可视化参数时的安全感。结果显示，显示的POI标记数量对参与者的安全感具有显著影响。而操纵UI元素（透明度、颜色和大小）的影响尚未得到证实。尽管如此，大多数测试者表示，操纵透明度和大小在某种程度上会影响他们的安全感，因此未来的研究应更仔细地关注这些因素。