![Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 17.1 User Manual | Documentation Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 17.1 User Manual | Documentation](https://www.altium.com/documentation/sites/default/files/resize/wiki_attachments/263971/DefaultDesignRule_Mask_SolderMaskExpansion_16_0_AD-546x251.png)
Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 17.1 User Manual | Documentation
![Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 19.1 User Manual | Documentation Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 19.1 User Manual | Documentation](https://www.altium.com/documentation/sites/default/files/wiki_attachments/294763/SolderMaskExpansion_18_0.png)
Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 19.1 User Manual | Documentation
![Solder Mask Expansion from Hole (New Feature Summary) | Altium Designer 15.1 User Manual | Documentation Solder Mask Expansion from Hole (New Feature Summary) | Altium Designer 15.1 User Manual | Documentation](https://www.altium.com/documentation/sites/default/files/wiki_attachments/263436/AD_MaskExpansion-Examples.png)
Solder Mask Expansion from Hole (New Feature Summary) | Altium Designer 15.1 User Manual | Documentation
![Solder Mask Expansion from Hole (New Feature Summary) | Altium Designer 15.1 User Manual | Documentation Solder Mask Expansion from Hole (New Feature Summary) | Altium Designer 15.1 User Manual | Documentation](https://www.altium.com/documentation/sites/default/files/wiki_attachments/263436/AD_MaskExpansion-Choices2.png)