What is the difference between 0, out and full, 100?

Seeing 100 but only briefly is because of rounding. DMX has 256 steps (0-255), percent as used for intensity has 100 steps. So when going increasing the intensity by 1 point, DMX will change two or three times in between. Full is only displayed for a true 255; 254 and maybe 253 get rounded to 100.

Out looks like it is a shortcut for At 0 Enter. For intensity this is almost always true. But actually Out means Home. If you change the home value of a channel's intensity you will see that Out makes it go to the home value rather than 0. This is also true for subs. Sub 1 Out Enter doesn't necessarily make it go to 0. The home position of an inhibitive sub is at 100

Thx for the answer. What is the difference between Out and Home then?

Out self-terminates. and in some context the Home button will not write the word Home but rather the first cue number. so GotoCue Out and GotoCue Home son't do the same thing

Out self-terminates. and in some context the Home button will not write the word Home but rather the first cue number. so GotoCue Out and GotoCue Home son't do the same thing