I usually find that CorelDRAW users either have a need to add dimension lines on a regular basis or they rarely if ever use them. There just isn’t a middle ground on a feature like this, or at least I don’t see the middle ground.
Should you fall in the rarely need them category, today’s macro probably isn’t for you. But those of you who have a regular need for dimension lines will want to check out GDG Dimension Gator. By using a macro, you can more easily add dimension lines automatically to a shape. When there are a lot of objects that need to be dimensioned, this macro can really save you a ton of time.