v4 and some other figures have joint correction deofrmers (magnets) built into the figure. These figures come with a Magnetise pose so that you can make these deformers affect conformed cltohing as well. I beleive many of the G2 figures from CP have joint magnets. None of the other DAZ gen4 figures do.

V4 has many magnetise poses, in case you have many (numbered) v4's in the scene. Generally you only need the first one.

 

Not all clothing makers make the clothing to be used with the joint magnets since many users dont use v4 as it was designed by DAZ. In general use the collar test - bend her collar bodypart so her arm raises. If her chest pops out of the shirt, you will need to magnetise the clothing item.

V4's breast movement morphs are almost all joint-magnet based so you must magnetise the item for these to work on the clothing. Some makers either dont realise this or dont care and create actual morphs for the movements, which can do bad things if the item is magnetised.

Poser magnets are also used to add morphs to clothing (as well as other uses), but that is a whole differrent subject.

L