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Does anyone know how to show some fields only when a previous one has a not null value? I tried what was on this link but it didn't work since when I go to the expression dialogue it can't find the field

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What I want to do is that the "Descripcion" group only shows up once DESRI_RX or Rock_Type, are not null (it needs to works on QField as well).

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    You should be able to see the field name in the expression builder, if not you could try to create your expression by hand typing the field name... – J.R Jun 16 '20 at 16:21
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I have also noted you cannot 'see' the field. But I have found a syntax that does work. Try...

attribute('DESRI_RX') is not null OR attribute('Rock_Type') is not null

I haven't tested, but hope that helps O

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