# Object tree

The *object tree* is a feature that allows managing (hiding, showing, or removing) drawings, indicators, and symbols on the chart.

The *object tree* is enabled by default but you can hide it by disabling the [`show_object_tree`] featureset.
Users can access the *object tree* through the left toolbar (in Advanced Charts) or the right toolbar (in Trading Platform).

## Fix undefined values

The `undefined` string appears in the *object tree* when the [`exchange`] and [`listed_exchange`] properties are missing from the [`LibrarySymbolInfo`] object.
You should provide this object via the [`resolveSymbol`] callback.

To resolve this issue, ensure these properties have appropriate values in the `LibrarySymbolInfo` object.
Alternatively, you can hide the symbol exchange display by enabling the [`hide_object_tree_and_price_scale_exchange_label`] featureset.

[`exchange`]: https://charting-library-docs.xstaging.tv/latest/api/interfaces/Charting_Library.LibrarySymbolInfo#exchange
[`hide_object_tree_and_price_scale_exchange_label`]: https://charting-library-docs.xstaging.tv/latest/customization/Featuresets.md#hide_object_tree_and_price_scale_exchange_label
[`LibrarySymbolInfo`]: https://charting-library-docs.xstaging.tv/latest/api/interfaces/Charting_Library.LibrarySymbolInfo
[`listed_exchange`]: https://charting-library-docs.xstaging.tv/latest/api/interfaces/Charting_Library.LibrarySymbolInfo#listed_exchange
[`resolveSymbol`]: https://charting-library-docs.xstaging.tv/latest/connecting_data/datafeed-api/required-methods.md#resolvesymbol
[`show_object_tree`]: https://charting-library-docs.xstaging.tv/latest/customization/Featuresets.md#show_object_tree

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