Dear diesellam
Reset appearance only resets color and transparency overrides. If you wish to reset items that are hidden :
1. I would recommend creating a selection or search set for the items you wish to hide in each file which will allow you to select these to hide unhide and/or create separate viewpoints with these items hidden unhidden to switch between.
2. If you wish to reset hidden items in the entire project, you can right click the unhide all button in the visibility panel of the Home Tab.
3. If you wish to unhide only specific elements that are hidden in a file:
Open Find Items in the Select and Search Panel of the home tab
Select the file name in the Search In tree
Add the condition to find all items with Category: Item, Property: Hidden, Condition: =, and Value: True
When you click find, all hidden elements in the file will be selected (though you won’t see them) and you can click hide to unhide them.
Best Regards

John Lipp
Support Specialist
Product Support
Autodesk, Inc.