Solids (Add/New/Remove) - Activate - Step 4

1. Restore the filter defaults.

2. ActivateActivate (Solid > Activate Object) the yellow cylinder, sketch a circle on the top of the cylinder, and select Remove Extrude from the popup menu.
   (These functions are available when customizing the toolbarscustomizing the toolbars (select View > Customize > Customize Toolbars & Menus from the menu bar).
   Add the Activate button to a toolbar as required.)

3. Use the parameters shown below:
   

4. Click on the Reference Object iconReference Object icon and pick the bottom object.
   
   The extrusion will only pass through the reference object (the yellow object remains unchanged).