Open the PCB Layout Editor:
- Switch to the PCB view if you aren’t already there.
Select the Target Pad(s):
- Click on the pad you want to modify.
- For multiple pads, hold Ctrl to select them all.
Access the Layout Rules Panel:
- In the right-side panel, locate the "Layout rules" section.
- Click on "Edit" or "Add" to modify the pad’s properties.
Add or Modify the Pad Shape Rule:
- Look for the rule labeled “Pad Shape.”
- If it doesn’t exist, add a new rule by clicking “Add” and selecting “Pad Shape.”
- Modify the rule to ensure the pad shape is square.
- For a rectangular (square) pad, confirm that the rule does not include any roundness parameters.
- Remove any corner rounding values if present, which will make the pad perfectly square.