Requested Toggle Alpha channel button on toolbar

[Vipera]

I would like to have a button on toolbar to toggle alpha channel for images which have it. I also would like to have ability to show alpha channel in different formats:
1. on/off - Show alpha channel over transparent color (main window color) / do not show alpha;
2. show alpha channel as black/white image

This button needs to be disabled for images which do not have alpha channel. Thank you!

[Bhikkhu Pesala]

See this thread

To be honest, if you need to edit 32-bit images (rather than just viewing them), there are other programs better suited to the task.

[Vipera]

I don't need to edit it but I need to check if image has alpha channel and quick preview it.

[Mij]

Open the image. From the menu select Image > Show Channel > Alpha
You will need to click on Undo to return to the image.

[Vipera]

If I can map this command on a key then I am fine with this but I cannot.