Think Bigger From Filmora User Guide

Change Playback Quality

You can adjust the playback quality of the Preview window for a smoother editing experience. For example, you can improve the performance of your preview by playing your video at a lower resolution than you want for your finished project or by creating proxy media files to edit with.

• If Filmora detects lags, it will prompt a message to ask you to lower playback quality.

• Reducing your playback quality can eliminate lags and save you time. Click the playback quality control menu, and then choose from these options: