I always record one 'song' per cakewalk file. During recording, there may be unnecessary parts of the recording before the real start/end. I will create markers for the Start and End, but this may change during production/arranging. I don't want to delete everything outside start/end because these sections may be used at a later date, so don't want to lose them, they just aren't necessary 'at the moment'. I could be exporting the same 'selection' many many times over the course of a production, with different mixes or arrangement, but the start/end markers do not move.
At the moment, every time I want to export a new mix, I have to :
Select All
Go to Start marker
F9 (From = now)
Go to End marker
F10 (Thru = now)
File/Export/Audio
Select Preset
Enter name.
Export
I can't just 'export audio', because that will include silence at the start and end of the track (which could be minutes at either end, depending on the track in progress).
I just noticed the new 'Export' module on the tool bar, which will help with 6-9, but there doesn't appear to be a way to fix the export selection (1-5).
So, that is my suggestion, a fixed exporting selection (either based on marker names, or time).