This tutorial will show you how to turn on the 120 FPS mode in Trails in the Sky 1st Chapter. To do so, make sure you follow the steps in the video and text below:
Step 1: Open the in-game menu.
Step 2: In the menu, select System.
Step 3: You should then select Options.
Step 4: Afterwards, switch to Display/Camera tab.
Step 5: Finally, set the High Frame Rate Mode setting to On.