Use the ToolTipFont property to change the tooltip's font. Use the ShowToolTip method to display a custom tooltip. The ToolTip / ToolTipTitle property indicates the layer's tooltip. The LayerFromPoint property returns the index of the layer from the cursor. Use the ToolTipWidth property to specify the width of the tooltip window Use 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 Background(exToolTipAppearance) property indicates the visual appearance of the borders of the tooltips. Use the Background(exToolTipBackColor) property indicates the tooltip's background color. Use the Background(exToolTipForeColor) property indicates the tooltip's foreground color.