0.87 - Batch convert preview show only alpha channel

[yochenhsieh]

XnView: MP 0.87 - 64-bit
OS: Windows 7 - 64-bit

Effect: Batch convert preview shows only alpha channel.

The preview window aside batch actions show only alpha channel. Since most batch actions are applied to RGB channels, it's difficult to see the changes. And it's no way to disable alpha channel in batch actions preview.

To reproduce:
1. Browse image files with alpha channel (TGA format).
2. Select some image files.
3. Open Batch convert using Ctrl + U key.
4. Press "Actions" tab near the output tab.
Try some actions, and preview window shows only alpha channel.

Expected behaviour: preview shows RGB by default, or at least able to disable alpha channel.

[xnview]

i can't reproduce, i have good preview

[yochenhsieh]

Please see attachment for reference.

I need to see the RGB channels for comparison, but cannot because of the alpha channel.
(note: the alpha channel must be kept after conversion.)

[xnview]

please send me the TGA file

[yochenhsieh]

I attached three files for you to test.

please note that the alpha channel must not be changed or removed.

[xnview]

i don't understand the problem. The image shown is with alpha channel from TGA file, so all is good

[yochenhsieh]

All right. If this is "good", is it possible to make the preview not show the alpha channel?

Any switch, options, or something that can toggle alpha channel on and off?