What is the first step to export a specific portion of a sequence?

The first step to export a specific portion of a sequence is to set and mark in and out points in the timeline. This action defines the exact section of the sequence that you want to export. By marking these points, you are indicating the start (in point) and end (out point) of the portion you intend to export.

This step is crucial because the export function needs to know which specific segments of the sequence to process and output. Without marking these points, you may inadvertently export the entire sequence rather than the desired part. The act of marking in and out points directly informs the export function of your intentions.

The other options involve different facets of video editing and production. Setting color correction settings is essential for enhancing the visual quality of your footage but does not directly relate to the export process. Adding a title contributes to the narrative or branding of the video but is not a necessary step for exporting a selection. Lastly, choosing a destination folder for the export is important but comes after you have specified the portion of the sequence you want to export. Thus, marking in and out points is the appropriate first step in the export process.