- What browsers show this problem?
Chrome - Please share an example project (if possible).
https://snap.berkeley.edu/snap/snap.html#present:Username=s_federici&ProjectName=Iceberg_ProcedureFinale_MartaRachele - Describes the steps to reproduce this issue
Enter image editor trying to edit costume "acqua" of sprite "acqua" - What does Snap! currently do?
The image shown in the image editor doesn't match the costume's - What should Snap! do instead?
Show the correct costume image
I think it might be your source images (or something going wrong when you import them)
I exported acqua - and it looked like this in MSPaint
But after I cropped it to get rid of the extra white and added it back into the project - it looks fine and can be editied
The project is imported in Snap from an original BYOB project. I guess the problem is in Snap's import procedure (but it is very old part of Snap; it is based on Scratch 1.4 file format that I have never understood 
)
Weird that the costume is correctly managed by Snap but it is not fully editable.
Can you send me a link to the original BYOB file - just for interest sake
Here you go https://gofile.io/d/ZGOhnl.
Unfortunately the BYOB format import procedure has an even more serious problem, where all costumes become small red squares 
Are you too running the online version?
Yes - standard Snap!
Weird. I don't think a specific Chrome version or OS should have an impact on this. Anyway, if someone wants to give it a try, my OS is macOS Catalina and the Chrome version is 86.0.4240.80 (Official build) (x86_64)
JFI I'm running Vivaldi on Win10
I installed Vivaldi both on macOS and Win10 (in a virtual machine) but to me the result keeps being the same: when I open the ypr file, the costume of the acqua sprite (when edited) is just a cyan square in the top left corner in both OSs
Chrome.86@Win10, I see this problem.
The image stored in the costume has a dimension 960x700 pixels.
It seems to me that only the part of the image is shown in the built-in editor.
Usually, Snap! trims the excessive parts of the image during import, so the editor is fooled by the extra data.
Everything works better in retina mode 
I trust you
Just to be clear: this is when you import the original ypr file I sent you, not after you exported and reimported the acqua costume, isn't it?
Yes I have the same idea, because the sprite just renders fine on the Stage. It is just weird that the image is correct but I can't fully edit it. Just to know: you have the same problem, haven't you?
Yep - file new - file import xxx.ypr
Thanks. I'm going to try with Vivaldi and my old Win 10 PC (no virtual machine)
I just tried it on myu old Win7/Chome and that was fine
Also, Ok for me using Win10/Chrome
Same result on my real win 10 PC: with Chrome wrong costume... (instead Vivaldi doesn't seem to be able to import the ypr)
The ypr.js procedure where developed by Nathan Dinsmore, that I guess is not around since a while.
So it is likely I'll have to stick with it