Use the ToolTipFont property to assign a font for the control's tooltip. The ToolTipPopDelay property specifies the period in ms of time the ToolTip remains visible if the mouse pointer is stationary within a control. Use the ToolTipWidth property to specify the width of the tooltip window. Use the CellToolTip property to specify the cell's tooltip. Use the ToolTip property to specify a tooltip to be shown when the cursor hovers the group's caption. Use the ShowToolTip method to display a custom tooltip. You can use the <font> HTML element to specify a different font for portions of text in your tooltip.