We need the ability to resize the custom attention grabber.
Several connected issues:
All attention grabbers in the gallery are in English. So if one needs an attention grabber in a different language, one doesn’t have a choice but to use a custom attention grabber
There aren’t any official dimensions for the attention grabber. By process of trial and error the correct size is incredibly small (for jpg/png) and looks of very low quality as a result
The ability to upload a .svg image (vector) would be much more logical, especially since the gallery ones are .svg themselves