No idea what I would do with my borderline OCD if not for this farm planner; If only mixing sprinkler types worked neater and scarecrows were a completely unfair square. One suggestion would be to add one more highlight to this tool: a shader for scarecrow coverage. Nothing opaque, just a color blind friendly transparent. Oh and I second or third the idea of Shift/control for placing down multiples of same item.
You can place multiples of same items already when holding down shift when placing it. Don't hesitate to read the controls section below the planner :) I'm little confused about the mixing sprinkler types problem. Could you elaborate please? Is the highlighting a problem there? Edit: Also I just figured this was posted wayyyyy long time ago.