Pick a reference grid
Tian zi ge supplies horizontal and vertical center lines; mi zi ge adds diagonal references. They help compare positions, rather than defining every stroke path. Follow your model character for the writing itself. Empty boxes keep only the border; check the specified form separately for exams. Comparison: tian zi ge vs mi zi ge.
Why do fewer columns appear?
Usable paper width limits the count. Portrait A4 with 10mm left and right margins allows at most 9 columns of 20mm cells. Requesting more does not shrink the cells. Check the preview.
The output is blank practice paper, without model characters, tracing text, or stroke order. For English handwriting, use four-line paper.