Edges highlighted in various colors - how to turn off?

I’m hoping someone can help me. I was working away in a model and I must have hit a command by mistake, but half of my lines (edges) changed to various colors. Does anyone know how this happens and how can I change it back?

What kind of colors? Show us a screen shot.

Are you still using SketchUp 2016 Pro?

Magenta and yellow were black before.

Using 2021 Pro

There’s not enough there to tell what’s going on but perhaps you have Color by Tag turned on in the Tags panel and edge color set to By Material in the Styles Edit tab.

Please update your forum profile. It’s very out of date.

Turns out the styles edit tab was set to by material. I have no idea how this happened. I’ve never been into those settings, so I must have hit a toolbar button or something by accident.
Thanks for your help, I’ll update my profile.

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