Not quite sure what you mean. In terriers, small terriers are often picked up by the chest and tail when placed on the table, then back on the floor. Terriers are bred to have a thick, heavily muscled tail, specifically so they can be pulled back out of a hole when hunting vermin. Havanese do NOT Have this type of tail musculature, and handling them this way could be very harmful. (And painful). What is done with Havanese in the show ring is very different, though I can see how it might be confusing if you see it in a still photo, or if you can’t see the hands under the hair.
Havanese are considered an “Outline breed”. A dog without its tail up, in correct position, is not going to win. Period. (Even though our standard only calls for the tail remaining up while the dog is gaiting
) For this reason, with a young dog who is not used to the show ring, or a shyer dog who may not keep its tail up (or simply a less correct one
) the handler will often HOLD the tail in the correct position either on the floor and even more commonly, on the table, for the judge to be able to see that “outline” when the dog is at rest. Since it is not against the rules for the dog NOT to carry its tail when at rest, this is considered fine. This is done simply by gently placing the flat hand behind the dog’s rear with the thumb on the base of the tail or just to use the fingers on tge tail to keep it in an upright position. There is no force applied, and it is not uncomfortable for the dog.
A good show Havanese usually starts to enjoy his or her time in the ring and the handler can keep their tail up without this. As an adult, Panda “self stacks” which means that she positions herself correctly without a human putting her in position, and keeps her tail up without the handler needing to get on the floor and hold her tail. Even so, in the hustle and bustle of the the show photographer’s area, where everything has to get done fast and move on to the next dog, her handler had to “help” her keep her tail up in this photo. It’s completely expected, and done very gently.