To change the width of several nets:

• Navigate to the PCB editor.
• Select "Rules" on the top left panel and "Add Ruleset".
• Select the new ruleset, and in the right-hand panel, name the ruleset via the designator at the top.
• In the "Selector" tab, add the designators of the nets you want to modify the trace width.
  • As shown in the example above, you can select nets using the "#" operator. You can also rename nets by bringing up the context menu for objects in the object panel.
  • Check out Selector-Based Layout Rules to learn more about using selectors.

• Create selector‑based rules targeting nets by name, tag, or property (more granular than fixed classes).
• Tie rules to stackup (impedance targets) and set precedence so critical nets receive correct geometry.

Add a Keep Out rule directly to the net

Type fills(1.5mm) in the Keep Out rule textbox. This will make the Keep Out rule only apply to fills.

Pro tip: you can also type 0.5mm fills(1.5mm) in the Keep Out rule. That will set a Keep Out of 0.5mm for every other object, but a 1.5mm Keep Out for fills.