In ArcPro 2.4.0 when I select multiple point symbols in the one layer, all with the same default circle (shape marker) symbol applied, I can't change the Outline width en masse. I can change the symbol size and the angle and angle alignment but not the outline width.
For some reason, the Layers tab doesn't appear when you have multiple points selected. Nor does the Structure tab for that matter.
It'd be great to have more of the symbology options exposed when multiple symbols are selected.
This has been marked by Kory Kramer as a Duplicate of Access All Editing Tabs When Editing Multiple Symbols Please visit that idea to upvote and comment. Thank you!