I'm not sure if you asking how to select a layers contents or how to select a layer by clicking on a colored area of the canvas, so I'll explain how to do both.
To help find what layer has a particular area of paint (Useful if you use a lot of layers, like I do at times):
- Select the Transform Tool (Note: This has now been removed from the Tool panel and placed on the Main menu along the top of the ArtRage Canvas area).
- Open the Settings Panel, if it's not already open, locate the option that reads "Select Layer" and make sure it is checked on.
- Click on the area of your canas that you are hoping to find the proper layer for among your layer stack.
- At this point in ArtRage 5, you will have entered the Transformation Mode, with the layer holding the paint you clicked on put within the transformation rig. If you intended to transform that area, you can proceed to do so now. If you just wanted to locate that layer, just click on the "X" icon of the Transformation panel or Hit your Escape key on your keyboard, to exit the transformation mode.
- The layer with the paint you clicked upon should now be the layer highlighted on the layer panel.
To select a single layers paint contents:
- Locate the layer that holds the color you wish to select (if you can find the right layer, try using the technique listed out above).
- Right Click the layer tab on the Layer panel or select the menu button for that layer and then select the option to "Select Layer Contents".
- The paint of that layer should now be selected, allowing you to copy and paste it or used as a color mask.
Nothing is easy to the unwilling.