Splitter feature is currently only available on our iOS app.
Click on the circle icon (bottom middle) > upload 1 high-resolution image > tap on the splitter icon on bottom right on the preview window > select the split ratio you want > click split on upper right corner > click upload and you’re done.
FYI: We pre-label the order so you can keep track. (ie: 1 of 9 means that image should be posted first). Please keep in mind that the grid is in reverse chronological order.