Use the sewing area, not the outside frame size
Measure or look up the usable embroidery area for the exact machine and hoop. The plastic frame’s outer dimensions are not its sewing limits. This tool accepts a rectangular area and a margin on each side, then checks both design size and the coordinates’ position around the origin.
A design can be smaller than the rectangle but offset far enough to fall outside it. Centering translates the stitch data to the selected origin. Rotation can help a wide design fit a tall rectangle, but it does not establish compatibility with an oval hoop, clamp, cap frame or specialized attachment.
Keep dimensions separate from stitch density
Rotation, mirroring and translation preserve the scale of the prepared design here. The tool deliberately does not offer simple stitch-coordinate scaling as a substitute for redigitizing. Stretching a dense fill or shrinking fine detail changes physical spacing and can change how fabric and thread behave.
Inspect the path at its intended size, including travel moves and the start position. Use your digitizing software if the design must become significantly larger or smaller, then regenerate appropriate fills and supporting stitches for the material.
Verify what the target machine actually loads
JEF contains hoop information in addition to stitch coordinates. This writer chooses among a limited set of legacy hoop codes; the UI dimensions do not select an exact Janome model or custom hoop. Export is therefore limited to centered designs below 200 × 200 mm, and the output header is exposed in the report.
Load the result into the intended machine software, confirm the recognized hoop and design position, and use the machine’s trace or boundary-check function where available. Follow its manual and test on scrap fabric before stitching the final item. A rectangle that fits on screen is only one part of that check.