Hi - The issue here for me is to use a single Gravit Designer file that has many branded items. For example, a print advert, a web page design and a graphic for a promotional item like a t-Shirt. Here I’d usually do something like this.
Print Ad: 8.5" x 11" bleed at 300ppi - CMYK - outputs to PDF with crops.
Webpage: Size varies, exports page and several elements at 144ppi @2x RGB PNG or SVG
TShirt: Export 1 color “Spot” color as EPS file.
I know I can make separate files for these, but during initial creative design time, it’s helpful to have all shared elements in a single file. ( I used to be able to do this with the now defunct Macromedia Freehang product. Loved it
Edit: I really wish graphics apps would list PPI instead of DPI