Supply Nets (Voltage = 0 . . .

To disable Auto Generate Supply Nets

Preferences > General > Advanced > Schematic.AutoGenerateSupplyNetsRule > Disable

Restart (Close and Open) Altium

See: https://forum.live.altium.com/#/posts/260254/848610

That's it !

Project Panel - Expanded View

Hold down the Shift Key and Click where shown below to Expand a Project Tree

That's it !

Return Path Design Rules - DRC Gotchas

The Design Rule

Note:  

Most designs should NOTinclude Not inAnyDifferentialPair in the Scope as shown.

This is a special case for the board used in this Return Path DRC feature review.

The example Rule shown above is targeting a specific Net Class.

You might want to set the Scope to target All

Gotcha 1

In Gotcha 1 the problem is the GND Via on the left has another signal routed between the flagged via and the GND Via.

Solution 1: Add another Via or Waive the Violation

Other Points of Interest:

Per online help

Exclude small areas of copper from flagging a violation by setting the required value (in sq. mils, 10 by default) of the PCB.Rules.ReturnPathIgnoreArea option in the Advanced Settings dialog.

That's it !

Manufacturer Recommended Patterns - PCB Libraries

Manufacturer Recommended Patterns - PCB Libraries Forum

Footprint Expert Nominal Dimension Calculator - PCB Libraries Forum

90 Degree Routing - Glossing Off

Glossing must be OFF to simplify creating 90 Degree Corners