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I've created a layout printed to PDF (A4, 1:1000) which shows an area of OS mapping (vector data) and this prints to over 8MB - is there a way to reduce the output size of the pdf?

I've tried removing all the unnecessary layers and this helps but only slightly.

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    Please provide details on number of layers, number of features and export settings.
    – Erik
    Nov 4, 2022 at 12:36
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    8mb seem a lot for A4 vector PDF, are you sure you did export as vector and not raster ? did you include the attributes ? did you try to check the "Simplify geometries to reduce output file size" (in the advanced option) ?
    – J.R
    Nov 4, 2022 at 12:39
  • Thanks both - I've got 'always export as vectors' and 'simplify geometries' both ticked on the export window (and nothing else), and compression to 'lossy'. It's 12 layers but all OS mapping so 00's-000's of features (road labels, buildings etc)
    – ag2
    Nov 4, 2022 at 12:47
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    – Vince
    Nov 4, 2022 at 13:15
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    You might add to your information what QGIS version you are using. Is this a geospatial pdf export? You might show a portion of your map; sometimes symbology and labels can add considerable complexity. On the other hand, sometimes something simple can be the problem. github.com/qgis/QGIS/issues/44656 So you could run some test exports with different layers turned off to see if one is a problem.
    – John
    Nov 4, 2022 at 17:40

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