What does "awaiting reviewer selection" really mean under the "minor revision" scenario? I just submitted a revised paper to ScholarOne (minor revision). I suppose that in most cases (of minor revision), the revised manuscript will only be reviewed by the ADM or associate editor. However, I just noticed that the status of my revised manuscript is now "awaiting reviewer selection". Does this entail that the revised manuscript has to go back to the original reviewer for (final) re-review? Or, could it be that it is an automatic status message showing that the editor is now reading/evaluating my revised manuscript and that this does not necessary mean that the revised paper has to go back to the original reviewer? Thanks for your insight in advance.
Try to recollect how the statuses changed when you submitted the paper the first time. 

Scenario 1: with editor/under editor evaluation >> awaiting reviewer selection >> under review 
If this is how the status had changed the first time you submitted the paper, then chances are that your paper is actually being sent for a re-review. 

Scenario 2: awaiting reviewer selection>> under review
If this was the way the status had changed, then it is possible that the online status tracking software uses the status "awaiting reviewer selection" to indicate that the paper is with the editor.