Specifies the picture that appears in the layer. Use Image to specify the image for the TRSChartLayer object. Image is a reference to a TRSPicture object (TPicture in VCL and TBitmap in FMX). Use properties and methods of TRSPicture to specify a bitmap, icon, metafile, or user-defined graphic to be displayed by the chart layer. The ImageMode property specifies how the Image will be drawn within the bounds of the chart layer.
Setting Image at design time brings up the Picture Editor, which can be used to specify the file that contains the image.