i think i know what you mean now. if you zoom your set, then hit the center button it may seem like it makes the set bigger. but really it's just restoring it to the size before you zoomed. i was thinking that maybe you were talking about a new feature that i didn't know about!
I use the button on the left with the dot in the middle to zoom and enlarge for publishing. I am not familiar with the white square trick. Anyhow, great set!
@lovetodrinktea Thanks! i don't think the zoom button makes your sets bigger for publishing. it lets you see things in your set more closely while working in the editor. learned the lesson a long time ago! i use the white square trick to get my sets to be the size i want.