How do I edit multiple layers in Photoshop at once? Highlighting them all or selecting them selectively while holding shift does not work (for example, when applying Layer Options effects to layers).
Adjustment layers can be useful here for the edits found in Image > Adjustments. More on these can be found here.
For layer styles, do what you want to one layer. Once done, right click on that layer and click Copy Layer Style. Select all the other layers you want to apply it to then right click on one of them, then click Paste Layer Style.
Hope that helps.