By default, the maximum resolution of the video export with rendered subtitles is 1280x720. It is possible to manage the resolution with a few easy steps in the workspace settings. 

Step 1:  Navigate to Media encoding settings in the Workspace settings.

Step 2: Add a new encoding profile

You can either 

  • Add a new encoding proflile or
  • Clone and edit an existing one by clicking on the three dots next to the encoding profile.

Step 3: Edit the resolution settings

Now you can select the desired encoding settings at the following step of creating burned in subtitles.