Delete Tool Problems

[cat]

Hi all,
I've very recently started using GIMP for some pic editing and I've been trying to delete selections of pictures, but when I try to delete the selected part, it just turns grey. 
I've gone through and added an alpha channel, used the lasso tool to select the part I want to delete and managed to get the marching ants around it, but when I try to clear or cut it, grey.
Any help would be really appreciated! 

Thanks

[Ofnuts]

Is it specific to a single image? Or does it happen with all images? Can you post a screenshot?

[rich2005]

A screenshot, something like the one below, is best, showing the problem but also the tools, FG/BG colour and layers.

Just for reference:

Without an alpha-channel (transparency), cutting a selection will use the background (BG) colour, which could be grey.

With an alpha-channel, The representation of transparency depends on Gimp settings.
In Edit -> Preferences -> Display there are various options, with checker pattern, solid.

Then of course with a layer under, you see whatever is there, which could be a plain grey layer.

   

[cat]

(10-14-2017, 09:40 PM)Ofnuts Wrote: Is it specific to a single image? Or does it happen with all images? Can you post a screenshot?

I've tried it on a few different images but I get the same result. Here's the image after I've selected and tried to cut/clear. Sorry it's a wing...I do research on honeybees.

Thanks again

[Blighty]

(10-15-2017, 06:10 PM)cat Wrote: Here's the image after I've selected and tried to cut/clear.

Hi cat
The delete/clear does work perfectly.
The image you provided shows the end result. We need to see how you achieved that end result. Can you provide a screenshot as suggested by Rich2005? Plus any additional info that may be relevant. Then we can probably work out where things are going wrong.

[rich2005]

With the best will in the world, the closest I can get to that, is an inverted selection then selection-to-channel and the channel visible...and I do not think it will be that



Your forum profile says you are using Windows XP. Is that correct?
Are you using a Mac or Windows with maybe a 4K display?

It looks like some sort of reduced transparency issue but how to reproduce I do not know.

[cat]

(10-15-2017, 07:19 PM)rich2005 Wrote: With the best will in the world, the closest I can get to that, is an inverted selection then selection-to-channel and the channel visible...and I do not think it will be that



Your forum profile says you are using Windows XP. Is that correct?
Are you using a Mac or Windows with maybe a 4K display?

It looks like some sort of reduced transparency issue but how to reproduce I do not know.

So, after looking at the screen shots you added I noticed that my images were originally saved with a duplicate layer of the wings underneath the first layer so I guess I was deleting the top layer but not the next one...feeling totally ridiculous right now... but thank you for all the help! I was originally concerned that I was deleting wrong or something.
Thanks again! 
Cat