Nested Grids – as the name suggests is a grid-within-a-grid (or rather, Grid-ception!). Nested Grids will let you expand a sub-grid entry to look at another grid of the expanded record. This depends on how you configure it.
Be aware, Nested Grids work with Editable Grids and only for Tablet, Phones and Unified Interface. This is not available for the classic Web UI.
Configuring Nested Editable…
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Nested Editable Grids in D365 CE v9 UCI – D365 Demystified
Quick guide on how you use Nested Editable Grids in D365 v9 Unified Interface
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