RadControls for ASP.NET AJAX
RadEditor offers two ways for creating tables. The best approach
depends on your preferences and the table complexity:
For simple tables we recommend the click-and-drag Table Builder

For more complex tables, the Table Wizard is more appropriate.
Table Wizard
The Table Wizard provides advanced features for creating and customizing tables in the editor's content area. The Table Wizard is a dialog with tabs for detailed table design: Table Design, Table Properties, Cell Properties and Accessibility. The Table Wizard can be invoked using the Insert Table Dropdown.
Table Design
This tab allows you to adjust the number of rows and columns, and adjust the row and column span.
Table Properties
This tab allows you to configure table dimensions and layout by setting one or more of the following table properties:
Width/Height - Specifies the height and the width of the table (in pixels or percent).
ID - Setting an ID for a table gives some options for advanced table handling.
CSS Class - Specifies table CSS class and style. This property should be used only by advanced users.
Background Color - Sets the background color of the table.
Background Image - Sets an image as the table background.
Alignment - Aligns the table to the left, center or right side of the page.
Cell spacing - Increases or decreases the space between the borders of the cells.
Cell padding - Increases or decreases the space between the content and the border of a cell.
Borders - Includes setting border width, color, and layout.
Cell Properties
The Cell Properties tab allows you to fine-tune the appearance of individual cells of a given table. Here you can configure cell width, height, alignment, background, the cell ID, toggle text wrapping and set the CSS class for a given cell.
Accessibility
The Accessibility tab allows you to adjust the number of heading rows and columns, add caption settings, add a summary and to toggle if the cells are associated with the headers.
Table Tools
The Insert Table dropdown includes tools for setting alignment
and borders.
Insert Row Above
Insert Row Below
Delete Row
Insert Column to the Left
Insert Column to the Right
Delete Column
Merge Cells Horizontally
Merge Cells Vertically
Split Cell
Delete Cell
Set Cell Properties
Set Table Properties