Multiple marked sections per clip to be exported at once

Please add the ability to mark multiple sections on the timeline of a single input file with the option to either concatenate the sections to a single file or to create one file per section when exporting.

Some DAWs and NLEs provide so called Range Markers for that. You mark a section with in- and out mark and press a button to turn the section into a range marker, which then appears on the timeline. Below a sample how that looks in Lightworks: