Designer HTML appears either as an inline image or as inline text, depending on whether the ALT or U-SRC attributes are used for the WEBBOT pseudo-tag. If U-SRC is used, the pointed-to image is rendered at the full image dimensions. If ALT is used, then the marked-up and possibly formatted HTML text is rendered inline with no additional visual embellishments.
The mouse pointer is changed to the standard WebBot cursor whenever the cursor is moving or hovering over the Designer HTML image or text.
Selection in FrontPage treats Designer HTML as a single unit to make it easy to move this unknown HTML around the page via the standard editing operations. If you want to edit the unknown HTML tags that are carried around by the WYSIWYG representation in FrontPage, then you can just double-click to get an editing dialog.