I would simply suggest you use Visualize Grid, and place the slots up next to each other. You WILL notice some gap during Visualize Grid, but that's normal for Win10. Just allow SAT to snap them when you drag and drop the slots close to each other.
More technical explanation below
If you are on Windows 10, then on most sites, it is normal to see gaps between tables when the tables are tiled. You can see here for explanation:
https://www.stackandtile.com/forum/showt...63#pid7263
However, you shouldn't be seeing gaps on WPN. That's because WPN draws their own custom table (you can tell by their non-standard titlebar), and so the "invisible resizing borders" which are mentioned in the above post are actually within the table boundaries on WPN, and so there is no risk of overlap.
More technical explanation below
If you are on Windows 10, then on most sites, it is normal to see gaps between tables when the tables are tiled. You can see here for explanation:
https://www.stackandtile.com/forum/showt...63#pid7263
However, you shouldn't be seeing gaps on WPN. That's because WPN draws their own custom table (you can tell by their non-standard titlebar), and so the "invisible resizing borders" which are mentioned in the above post are actually within the table boundaries on WPN, and so there is no risk of overlap.