The Drawing Layers Layers collection is used to store the definitions of the Layer names and colours assigned to Layer numbers.

The (value) after the name is a count on how many definitions are stored in the collection.

The right hand pane shows the data entries as a spreadsheet, and the properties of each data entry can be modified as required.

Some properties have a drop-down selection menu which pops-up when the property is double-clicked. Other properties are typed entries - simply click in the field to place the cursor, then type the required value.

See Add to Collection or Remove from Collection to add or remove definitions.