I just posted a tutorial which may be of some value to people: how I do type knockouts in Adobe Illustrator, using opacity masking. It's my preferred technique for clearing space around labels; more versatile than halos, and non-destructive.
https://somethingaboutmaps.wordpress.com/2015/05/08/type-knockouts-in-illustrator/
أكثر...
https://somethingaboutmaps.wordpress.com/2015/05/08/type-knockouts-in-illustrator/
أكثر...