Revit line weights are set in two places. Object Styles (Manage tab > Object Styles) set the default line weight for each category across the whole project. Visibility/Graphics overrides change how lines look in one view, or for one object. To make your own line for detail lines, add a new line style under Manage > Additional Settings > Line Styles.

What are the two kinds of line weights in Revit?
- Global line weights (Object Styles). The project defaults, set per category and subcategory. A door, for example, has separate weights for the frame, the panel and the swing, and they’re the same in every view.
- View-specific line weights (overrides). Also called Visibility/Graphics overrides. They change how a category or one object looks in one view only. You don’t need layers like in AutoCAD.
How do I change line weights for the whole project?
- Turn Thin Lines off, or you won’t see any change. It’s on the Quick Access toolbar (shortcut TL).

- Go to Manage tab > Object Styles.


- Find the category and expand it. In this example we’ll change Stairs.

- The Projection line weight is 1 by default. Change it to 3 and click OK.

The plan view updates right away.
The numbers 1 to 16 are pens. The actual width of each pen, for each view scale, is set under Manage > Additional Settings > Line Weights.
How do I change line weights in one view?
- In the view, right-click the object.
- Pick Override Graphics in View, then By Element for just that object, or By Category for every object of that category in the view.
- Set the line weight, color and pattern, and close the dialog.

The change shows up right away, and only in that view.
How do I make a custom line style?
- Go to Manage > Additional Settings > Line Styles.

- Click New.

- Type a name and click OK. I called mine “Thin Line Red”.

- Set the line weight, color and pattern, and click OK.

The new line is now in the list when you use Annotate > Detail Line:

Why aren’t my line weights changing?
- Thin Lines is on. Every line shows at one width. Press TL to turn it off.
- A view override wins. An override in Visibility/Graphics beats Object Styles. Check the view’s V/G settings.
- A view template controls it. If the view has a template that controls V/G, change the template instead.
- Wrong scale. Model line weights change with view scale. Check the Line Weights table for the scale you’re using.
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