Grading Rules

Once a Size Chart has been created, you can define grading rules to control how each point on the pattern develops across different sizes.

Assign the Size Chart before grading

If the grading rules have not yet been defined:

1. Click Assign Size Chart in the sidebar.

2. Select the newly created Size Chart.

3. Click the Grading button.

This will open the Grading Settings panel in the central area, which shows:

• The active Size Chart

• The Sample Size associated with the anatomical set

• A message saying "No Grade Point selected" — meaning no grading points have been activated yet.

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How to assign grading values

1. Click on the point where grading should be applied (grading-eligible points are shown along the edges of the pattern pieces).

2. When a point becomes active, a red dot with a small white center will appear.

This opens the Grade Rule window, which includes:

• The grade rule point Name

• The list of sizes from the selected Size Chart

• Input fields for X and Y coordinates

Inputting grading values

• Enter X and/or Y values in the input boxes.

• If the value should be the same for all sizes, click dx mm or dy mm to auto-fill the column.

• The base size will always remain at 0.

• Clab Assistant will automatically apply the entered value symmetrically:

  • Larger sizes will use the entered value (e.g. 6)

  • Smaller sizes will use the opposite sign (e.g. -6)

✅ Example 1: Entering -6 in one of the smaller sizes will set -6 for all smaller sizes and 6 for all larger ones.

✅ Example 2: Entering -2 in a larger size's Y column will assign -2 to all larger sizes and 2 to smaller ones.

Once finished, press Enter, then click Save. The grading applied to that point will immediately appear in the preview window.

Additional tools in the grading editor

Moving and zooming

With grading active, you can:

• Pan the pattern pieces

• Use the mouse wheel to zoom for better visibility of each graded point

Handling irregular grading

If some sizes require different values:

• Manually edit the X or Y values for each affected size

• You can select individual cells and enter custom values

Fixed points

If a point has 0 for both X and Y:

• Click the Set a fixed point icon to assign zero to all sizes (making it static)

Copying and pasting grading rules

To reuse a rule from one point to another:

1. Click the Copy icon on the source point

2. Select the target point

3. Click Paste

4. Click Save

Invert a rule's direction:

After pasting, use the arrow icons:

• Invert X (↔︎) to reverse horizontal values

• Invert Y (↕︎) to reverse vertical values

Then click Save again.

Complete the grading process

Make sure all pattern pieces are fully graded. You can repeat the steps above for each necessary point.

Important: Never modify the grading rules of an existing Size Chart directly if it is used in other projects. Instead, duplicate the chart, rename it, and apply your changes to the new version. Otherwise, any changes will affect all projects using the original chart.