you have to be in XpressRoute.
Open an Assy, then from tools tab enter into XpressRoute.
Now in SE Options you will have Tube Properties.
I opened ER Number 6993190 last month for one of our customers asking asking for the same.
there is no current way to set a list of defaults similar to a gage table for example... is a one for all setting... requested ER to allow a gage table like settings for tube properties.
if you want to get added to the ER officially you need to call either your VAR or GTAC and ask to be added the ER.
The more folks attached to ERs the more priority they will get in planning and development
Not the exact UI that Matt describes, but Johan, the ability to save and recall tube values is covered in ST7 -- one more thing to look forward to!