> For the complete documentation index, see [llms.txt](https://help.prequilt.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.prequilt.com/prequilt-101/build-a-block-unit-for-the-fabric-calculator/rectangular-units/snowballed-corner.md).
# Snowballed Corner
Snowballed Triangle Corner Rectangle Block Unit
## Snowballed Block Unit in PreQuilt
A **Snowballed Corner** can be created in PreQuilt just like it is in real life when you're sewing it. Generally these snowballed triangle corners are on top of a square or rectangle.
Unlike some of the other Block Unit help guides, this one will focus only on creating a snowballed corner rectangle block unit.
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### YouTube Video
*Coming soon...*
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### Help Guide
1. Click on the **BLOCKS tab** on the left side control panel.
2. Click on the **Make Custom Block** button.
3. The **Block Editor panel** will slide out and overtake your screen. My block is set to 12" x 6" finished, but it doesn't matter, the next steps will work for all sized blocks.
4. Set your grid guidelines by changing the number for the horizontal and vertical units.
* Since I'm going to be creating a rectangular quilt block, I'll set my gridlines to 2 horizontal and 1 vertical unit.
5. Click on the **square shape** () from the central control panel.
6. Click on the **Size to Fit** button () on the central, vertical toolbar.
7. This will enlarge the square to fill the entire space of the rectangle.
8. Click on the **half square triangle shape** () from the central control panel. (It might camouflage in with the rectangle behind it. You can see that there is a square bounding box for the triangle).
9. Click on the **Link button** for a different fabric link (so that there are now 2 different fabrics being used). In this example, I am using Fabric Link B.
10. **Move** the half square triangle piece into the bottom left corner of the rectangle. It should cover the square.
11. Click on the **Rotate button** () on the central control panel so that it is in the correct orientation.
12. You now have a **snowballed corner on a rectangle**.
### Alternative Snowballed Corner
Unlike the example in the first Help Guide, sometimes the snowballed corner does not extend to the full height or width of the rectangle or square.
Follow these instructions for creating a snowballed corner that is not the full height or width.
1. Click on the **BLOCKS tab** on the left side control panel.
2. Click on the **Make Custom Block** button.
3. The **Block Editor panel** will slide out and overtake your screen. My block is set to 12" x 6" finished, but it doesn't matter, the next steps will work for all sized blocks.
4. Set your grid guidelines by changing the number for the horizontal and vertical units.
* Since I'm going to be creating a rectangular quilt block with the snowballed corner being half the height and ΒΌ of the width, I'll set my gridlines to 4 horizontal and 2 vertical unit.
5. Click on the **square shape** () from the central control panel.
6. Click on the **Size to Fit** button () on the central, vertical toolbar.
7. This will enlarge the square to fill the entire space of the rectangle.
8. Click on the **half square triangle shape** () from the central control panel. (It might camouflage in with the rectangle behind it. You can see that there is a square bounding box for the triangle).
9. Click on the **Link button** for a different fabric link (so that there are now 2 different fabrics being used). In this example, I am using Fabric Link B.
10. **Move** the half square triangle piece into the top left corner of the rectangle. It should cover the square.
11. Click on the **Rotate button** () on the central control panel so that it is in the correct orientation.
12. You now have a **snowballed corner on a rectangle**.
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## Sewing Construction Diagrams
### 1 at a Time - Snowball Method
*Coming soon*