How to hide canvases as card opens

[Wilko]

My app has several canvases that always appear black when the card first opens and this looks quite ugly because the card is pink.
I have tried using the CANVASCLEAR command to set their color to match that of the card and although it does work the canvases still appear in black for a fraction of a second. Is there a workaround so that the canvases are never seen until I acvtivate them?

[Malkom]

Inside HAC you can set the properties of your controls to invisible and then later in you app set them to visible when needs be.

To set a canvas to invisible:-

1) Select the canvas
2) In the Toolbar - Creator Properties - select the Place TAB
3) Below the coords setting is the Visible check box, usually checked
     so just uncheck it.