LINE WEIGHTS NOT CHANGING
Object Styles govern globally unless Visibility/Graphics overrides are invoked. So if you assign pen 5 to something in Object Styles but change it to Pen in 3 in V/G then Pen 3 is what you should get. If someone has used Override Graphics (right-click option) then changes to OS or V/G won't change that element's appearance.
Also the Lineweights table governs the thickness of each "pen" at different scales. This way as a view scale gets coarser lineweights can get progressively thinner to avoid creating muddy drawings.
What category element(s) are you trying to change?
Steve Stafford
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Revit has a Hierarchy of overrides. Object styles and Visibility Graphics a re pretty low on the list. check this chart out and start checking some of the items 7 and above (see attachment...).
Howard Munsell
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