If you were to stumble across a post like this in the low quality review queue, there would be an option to leave a boilerplate comment:
There you'll see the "officially sanctioned" comment to leave on these sorts of posts. For ease of copy and pasting:
If you have a new question, please ask it by clicking the [Ask Question](http://graphicdesign.stackexchange.com/questions/askhttps://graphicdesign.stackexchange.com/questions/ask) button. Include a link to this question if it helps provide context.
If you're interested in this sort of boilerplate functionality everywhere, check out this script: AutoReviewComments - Pro-forma comments for SE