Here is a list of all struct and union fields with links to the structures/unions they belong to:

- u -

• undo_bottom : st_page
• undo_current : st_page
• undo_tos : st_page
• unnamed_busname : st_toplevel
• unnamed_netname : st_toplevel
• untitled_name : st_toplevel
• up : st_page , st_undo
• upper_x : st_box , st_picture
• upper_y : st_box , st_picture
• user_data : WeakRef , change_notify_entry