The following user interface (UI) elements are displayed if your environment settings are configured for general development and you have clicked the General node in the HTML Designer node in the Options dialog box, or if you have the Show all settings check box selected.
Enable HTML designer (requires restart of Visual Studio)
When this option is selected, you can edit pages in Design view. If you disable this option, you can edit pages only in Source view.
When this option is selected, the editor initially displays Web pages in Source view, showing the page's markup. For details, see Source View.
When this option is selected, the editor initially displays Web pages in Design view, showing a WYSIWYG-like view. For details, see Design View.
When this option is selected, the editor initially displays Web pages in both Design view and Source view. The default behavior is for the two views to be arranged horizontally. To arrange the two views vertically (side-by-side), choose the Split views vertically option.
Assign unique IDs to new tables
When this option is selected, Visual Studio automatically adds an identifier to the <table> element for each table that you add to the page (for example, when you insert a table from the HTML or Standard toolboxes, or when you choose Table, and then Insert Table in Design view.) The identifier is of the format id="table1", and the values for the id attribute increase incrementally starting at table1 (table1, table2, table3), and so on.
Auto keyboard switching
When this option is selected, the keyboard language changes to the language of the text where the insertion point is placed.
Split views vertically
When this option is selected, the Design view and Source view windows are arranged vertically (side-by-side).