This is screen shots [had to go on google to find out how to do it๐] of the painting I wanted to split into TWO, I have managed to do this in Affinity Photo when I saved the file through export with the Tiff box ticked it still shows as an 'Item Type' Afiinity Photo File' on my folder screen when you hover over the file. Though as my comment to Walts post says it does show as a Tif until you hover over the file?.
If this is how it must be then thats okay and I'll carry on in my ignorance๐ Just as long as I can save as a Tiff, as this is better for printing my art onto cards and for my daughter to sublimate onto her products.