View is well designed, and searching of mails via "View/Custom View" is far beter than current "Advanced Search" in search result display. - Search result is shown at thread pane of folder in 3 pane window - user can choose column setting freely - message is shown in message pane, as usual message display - search result can be shown in different tab. currently, by open folder in new tab and apply a Custom View - Because of a Custom View, last search is always saved. However, if user tries to use the convenient View/Custom View for his ad-hoc search, very many steps are required currently. View -> Customize... -> find a my custimized view for my search, and select a customized view -> Edit -> Modify search conditions -> OK to save conditions -> OK to close list of customized views -> View, again -> Custom Views -> find a custimized view for my search, and select a required customized view This is because current UI of View is not designed for ad-hoc search. Current UI of View is designed for pre-defined view only. A solution of it was "Quick Filter Bar", but it can not be successor of current "Advanced Search". If button like next will be available, I believe it can be used as succesor of "Advanced Search". - Search button(Menu button, with associated menupopup) Open defaut search view / Dropdown menu (List of search views) Default Search view Search view #2 | Search view #N (New Search) search condition panel, with check box of "current tab" or "new tab" set as "default search" Do search, or simply Save, or Delete, or Cancel | V show the view Above is esentially same as current View/Custom View/Edit, except action of "OK" button. Custom View/Edit : Save the edited View Search View : Show the View(==Do search) Above is also esentially same as current Advanced Search, except action of "Search" button Advanced Search : Show the view in his own panel Search View : Show the View in Tab - Show "Search View" as independent one from customizable View items. - Search view is hidden at View/Custom Views - View items and Custom Views are hidden at Search View list - New category of "search_view" may be convenient for implementation. I think change like "Show the view in Tab by Search button of current Advanced Search" is acceptable as first step, because "File/New/"Saved Search" is already iplemented and works pretty well then loss of "Save as search folder after execution of the current search" won't produce any problem. In this case, "pre-defined Custom View named Search or Ad-hoc Search" is sufficient for the first step. I don't think "Search or Ad-hoc Search in Custom View list by default" will produce problem.

Needless to say, if "Save as search folder" button in "Advanced Search" panel will be killed, "File/New/"Saved Search" should be changed to "File/New/"Search Folder", because "*SAVED* Search Folder" won't exist any more.

Bug 1102861 - Integrate 'Search Message...' window into the main UI + Add button for quick toggling between folder view and search view + Extend features May be of interest for those reading this bug report...