Hi John,
Edit > Unhide > Last … Works globally only once.
After that, the Unhide command is context sensitive.
That is, if you hide an entity while editing a group; you must re-enter the group’s editing context to unhide the entity.
It’s best to use the Hide command sparingly.
There are faster, easier and less confusing ways to gain visibility as you’re modeling.
Learn to group geometry as you model.
Then setup keyboard shorts for these commands.
• View > Component Edit > Hide Rest of Model
• View > Component Edit > Hide Similar Components
Section Planes are another way to gain a view of what you need to see.
Here’s a handy little plugin that will unhide all your hidden entities in one go.
Unhide All by R. Wilson
-Geo