If your embroidery is too large or contains a number of designs spaced around an article, you can use the great tools in the Multi-Hooping toolbox to split it into multiple hoopings.
The aim is to add hoops and move them around until you get the least number of hoopings necessary to accommodate the entire design. These are then stitched out consecutively.
The Multi-Hooping Toolbox is available in Hatch Embroidery Composer and Hatch Embroidery Digitizer, and it contains all the tools you need to successfully stitch out large designs.
Multi-hooping is a very complex topic, so I added links to the relevant sections of the Hatch Embroidery User Guide, so you can have a really good understanding of all aspects of it.