Quest Log functional - how?

All greetings!

How can be realised in uUI Unity 5.2 functional QuestLog? (The list consisting of buttons with the short description of quests is output. By pressing the short description - the text with detailed data is smoothly unfold from under it shifting following items of the list downwards.)

I used Vertical/Horisontal Layout Group, Content Size Fitter - but to achieve possibility smoothly to move apart items with promotion of the detailed text - could not.

How in general to anchor one UI the object to edge of another with possibility to expand manually the first and that the second moved aside thus. Excuse for my bad English.