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I want to wrap legend text after a certain amount of characters. Is there an automatic way to do that?

I don't want to enter a character (e.g. *) for each line as described in this post, that is too much work...

enter image description here

Edit: I tried to use an expression, but the button is greyed out...

enter image description here

2 Answers 2

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You could use an expression string for your labels:

enter image description here

with_variable( 'column',37,
   if(length(@symbol_label) > @column,
      regexp_replace(left(@symbol_label,@column),'(.+)([\\s,;\\.])([^\\s,;\\.]+)$','\\1\\2\n\\3') + substr(@symbol_label,@column+1),@symbol_label))

Without expression string: enter image description here

With expression string: enter image description here

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  • thank you for your answer. do you have an idea why the epsilon-button is greyed out in my case? Commented Sep 16, 2020 at 17:31
  • You have to select the layer in the legend dialog like in my case.
    – christoph
    Commented Sep 16, 2020 at 17:33
  • I did. But it is a raster layer and you have a vector layer. And I am using the styles of a qml-file. Maybe that is why? I edited my question and added another screenshot. Commented Sep 16, 2020 at 17:34
  • Yes, you are right. That‘s totally different... sorry, didn‘t look close enough.
    – christoph
    Commented Sep 16, 2020 at 17:38
  • I guess it's not possible at the moment. You could post a change request in Github.
    – christoph
    Commented Sep 16, 2020 at 18:08
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Since QGIS 2.4 you can use wordwrap function.

For 50 characters it would be like this:

wordwrap(@symbol_label, 50)
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