By default, the OverlaidType property is exOverlaidBarsNone. By default ( exOverlaidBarsNone ) the overlaid bars are not displayed, as shown in the second picture. For instance, if the OverlaidType property is exOverlaidBarsOffset and two task bars are cover each other, they get displayed using a different offset. The IntersectBars property determines if two bars intersects if returns 0. The ItemBar(exBarIntersectWith) property retrieves a collection of bars that interest with the current bar. Use the OverlaidOnMoving property to prevent overlaying the bars while the user moves or resizes the bar at runtime.

Use the Overlaid... properties when multiple bars are displayed in the same item and you want to distingue them when they covers each other. In order to get the overlay feature runs please follow the steps: 

• Use the OverlaidType property to specify the type of overlaying when bars covers each other. By default, no overlay support.
• Use the Overlaid property to specify a different parameter for specified overlaid types. For instance, you can specify the vertical offset or transparency being used to display overlaid bars.
• Use the OverlaidGroup property to specify a list of bars ( separated by , character ) that may cover each other. By default, only bars of the same type in the same item, that covers each other are displayed using different vertical offsets, transparency, and so on. Instead, if the OverlaidGroup property contains another type of bars, they all together may cover each other using different vertical offsets, transparency and so on.

The following picture shows the bars arranged as a stack, when multiple bars cover each others bars: ( OverlaidType = exOverlaidBarsStack Or exOverlaidBarsStackAutoArrange )

The following picture shows the bars using a different vertical offset and a different transparency, when multiple bars cover others bars: ( OverlaidType = exOverlaidBarsOffset Or exOverlaidBarsTransparent )

By default, the following picture shows the bars at the same vertical offset, when multiple bars covers others bars: ( OverlaidType = exOverlaidBarsNone )

The OverlaidType displays the bars that covers each other as follow:

• exOverlaidBarsOffset using different vertical offset. Use the Overlaid(exOverlaidBarsOffset ) property to specify the offset being applied when the bars laid over. The bars gets arranged on maximum 3 layers, and the height of the item is not changed.

  

• exOverlaidBarsOffset or exOverlaidBarsTransparent using different vertical offset and transparency. The bars gets arranged on maximum 3 layers, and the height of the item is not changed.

  

• exOverlaidBarsIntersect using a different bar for the portion that covers. Use the Overlaid(exOverlaidBarsIntersect) property to specify the name of the bar that's displayed in the portion that's covered by two or multiple bars. For instance, you can add a copy of the current bar with a different color, and when two or multiple bars cover each other, the portion that is laid over can be displayed using your clone bar with a different color. The bars gets arranged on 1 layer only.

  

• exOverlaidBarsStack arranges the bars as a stack as soon as they cover each other. If this flag is set, the control resizes the item so all bars fits entirely in the item, so we would recommend to set the ScrollBySingleLine property on True, as items with different heights may be displayed . The ItemHeight property specifies the height of the item. Use the ItemMaxHeight property to limit the height of the item when multiple bars covers each other. The Overlaid(exOverlaidBarsStack) specifies the distance in pixels between two bars that covers each other. The Overlaid(exOverlaidBarsTransparent) specifies the percent of transparency being applied to bars in the same item that are not moved or resized. The bars may be arranged on multiple layers, and the height of the item is being changed.

  

• exOverlaidBarsStack or exOverlaidBarsStackAutoArrange arranges the bars as a stack, and auto arrange them to best fit in the item. The bars may be arranged on multiple layers, and the height of the item is being changed.