why when I EXPORT image, does it make it 1px bigger?

[wscrcom]

I have an icon, 13x14. I select the icon, EXPORT, SELECTION WITHOUT BACKGROUND, and Affinity changes the size to 14x15

 

Why does it do this, and how can I stop it from doing this?

 

Thanks

[walt.farrell]

You probably do not have it positioned properly on the pixel grid. Check the Transform panel and you will probably see either its X or Y coordinate is not a whole number but has decimals specified (e.g.,  21.5 rather than 21.0). Note that what you see may depend on the number of decimal places you've specified in the User Interface portion of your Preferences.

[wscrcom]

Thanks Walt. Appreciate your reply

 

Im not sure I understand what you mean. I have rounded off the X and Y but its still doing it. 

 

Sorry if I am missing something from what you said!

 

Please see video for what I see this end when I try to do this. 

 

https://sales-wscr-com.tinytake.com/sf/Mjk5ODg5N184OTkxMDIy

[walt.farrell]

I believe that, as in your other topic, it's an effect of the rotation. The X and Y coordinates are for what would be the upper left corner if the object wasn't rotated. Since it's rotated, they are still for that corner (the one to the left and below the rotation handle, circled in red below):

And you've put that corner exactly on the pixel grid. However, you're exporting without background, and so (I think) it's important that the visible edge of the object (marked in red below) is what's on the pixel grid, not the outer box:

I'm not sure if any of the other equivalent points will be relevant, but I believe the one I marked is. When I did an experiment similar to what you have, that point was at something.3 px.

If I had your actual file (or at least something containing that object) I could perhaps say more (or perhaps not; I'm still a novice at this). Maybe someone else will have additional ideas or a real solution. Sorry.