Tool Layer Table
You can use the Tool Layer Table option, when you want to add, change, or edit numeric code for specific layers.
Icon & Location
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                                            Menu: File> Tool Layer Table 
To use the Tools Layer Table tool:
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                                            From the main menu, go to File > Tools Layer Table. 
 The Tools Layer Table dialog appears: 
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                                            To add a layer, click Add. 
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                                            To delete a layer, select the row of the layer, then click Delete. 
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                                            To export the layer table so it can be sent to others, click Export. (The table is saved in an LYT format). 
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                                            To import a layer table from another user, click Import (You can only import LYT format types). 
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                                            To merge another layer table with the current table, click Merge. 
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                                            To sort the layer table, click Sort. 
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                                            Click Close when you are done.