3D - Model Tree

Default settings of the Model Tree.

Options tab > Preferences group > Preferences > 3D - Model Tree.  

Size (Default: Double size)
Select the size of the Model Tree at program start-up

• Small
  Display the Model Tree in half size.
• Regular
  Display the Model Tree in regular size.

Highlight while moving mouse over parts (Default: Active)
Highlight parts and assemblies when moving the mouse over their names in Model Tree.