[libreoffice-users] Nested Drop-down List

Hi:

Hope that all are well.

I am using LO 7.3.2.2 (x64) on desktop Win10 Home.

I want to fine tune a LO Calc file by adding a column that includes a 
Category drop-down menu, but I find that I might have need for 
subcategories, in some cases, to avoid a very long list of items.

I recall viewing a tutorial about what I am calling "nested drop-down 
menu list", whereby if an option in the parent drop-down is selected, a 
second, a third, ... etc. drop-down list is then opened, if they exist. 
For example, if one option is utilities, a second drop-down is opened 
showing, e.g. telephone, electricity, heating fuel, water, etc., as 
further, optional, selections.

Unfortunately, I cannot recall if the tutorial was for Excel or Apache 
Open Office or Libre Office.

Can somebody point me to a */Libre Office/* video tutorial or within the 
LO Help that covers "nested drop down list"? "Nested drop-down menu 
list" is most probably an incorrect key word text string.

Thanks for reading this.

VinceB.

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