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I'm testing out QGIS for the first time, and I'm trying to find a way to highlight index contours.

I'd like to be able to do so via the layer Symbology, or if necessary by separating out the index contours I want into a separate layer.

I've tried building a query to select every 10th contour using the generate_series expression, but I'm not well versed in crafting these and thus far I haven't been successful.

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I was able to create a filter to select index contours using the expression ("Z" % 10) = 0 where "Z" refers to the elevation attribute, and "10" is the interval I wanted for my index contours.

Index Contour Rule

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