The work area is represented by the blue bar running along the time ruler at the top of the track view.
You can use the work area to specify a particular part of your Editor sequence to export, rather than exporting the entire timeline.
To set your Editor sequence work area, drag the grey tabs at the start and end of the blue work area bar. You can also press the I key or the O key on your keyboard to set the work area in and out points to your current playhead position.
Pressing the P key will set the work area to encompass the contents of your timeline.
Holding the Alt key and dragging on the work area will move it without changing its duration.
Exporting the work area
To export your selected work area, click either the Export button at the top of the Editor sequence timeline, or switch to the Export screen.
In the Timeline menu, ensure that Editor is selected and that the Export Area menu is set to Work Area. Only your chosen work area will be exported.
For information on the rest of the export settings, take a look at the Export section.
RECAP The work area is useful for exporting a specific section of your Editor sequence, rather than the entire timeline.