Isekai_lover Hmmm, your explanation is still vague, but maybe I understand what you mean. Based on your question in the other thread, am I correct that you want the character to, for example, hold his hand at frame 0, open it in the middle of the animation, and then eventually maintain the pose of an open hand? However, even if this is what you want to do, I don't see anything particularly difficult about doing this, so I'm not sure what is unclear to you. Could you tell us what you actually tried and what did not work?
By the way, if English is not a native language for you, this forum has a translate button so you can post your question in your native language.