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How can I make it that the font size of the label changes when I zoom in and out? I have a polygon and I want the label get bigger when I zoom in and smaller when I zoom out (just like the polygon does). I tried to use map points but it didn't work.

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  • I use the following conversion: If the map scale is 1:20 000, 1pt = 7.056 map units and 1mm = 20 mu if the map scale is 1:50 000, 1pt = 17.64 mu and 1mm = 50 mu At my workplace, these days, we really only use those two map scales. Some of our ArcMap symbology is measured in pt and some in mm which is why I need to convert both.
    – jrickards
    Commented Apr 7, 2020 at 12:03

2 Answers 2

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Right-click on your layer -> Properties... -> Labels ->

According to your CRS, you can use "Meters at scale" or "Map Units"

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Try changing the size unit to Map Units. You might have to make this a very high number depending on the scale of your map, for instance in the project I'm working on at the moment at 1:260000 I have to set fonts to 700 map units to match the original 8pt text.

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