1. How do I make the following image one-way down arrows the same size as the Bubble Tileset? If I just did a simple 90 degree rotation, it would look like what is seen in the second attached image, as compared to how namida rotated the arrows in the Bubble tileset.
This might be tricky. This should work:
1. Rotate it as you have.
2. Increase the height of the image (not resize; you're wanting to add blank space) to double.
3. Copy / paste the existing arrows so they fill the new empty space as well (making sure they're at the right position exactly).
4. Import this into the Graphic Set Tool (be sure to use the horizontal strip setting).
5. Export the image as a vertical strip.
6. Halve the width of the image (again; remove area, not resize).
7. This should give you an image that, when re-imported, does what you want.