https://www.pcgamer.com/chrono-trigger-patch-bring-back-old-school-battle-ui-and-character-design/

Chrono Trigger's PC port was a disaster. Fiddly controls, a weird smoothing filter and a locked resolution disappointed fans, prompting modders to embark on a quest to fix it. Square Enix is doing its part too, with a patch last month that brought the graphics in line with the original, and yesterday it released a second patch that adds new options for both the battle UI and character models.

The new UI is "based on the look and feel of the original Chrono Trigger", and you'll be able to switch to it in the settings menu. It's designed to be used with either a keyboard or a controller—you can pause the game during battle by tapping the space bar or the start button on your control pad. The UI that shipped with the port, which is still available, is meant to be used with a mouse or a touchpad.