I tried to read the answer to someones question, but nothing happened when I clicked the icon

BobRay

I just signed up for this community so I had a place to go to ask trello questions.  my first question actually was about 'un inviting' people from my board.  More specifically, I designed the board, and invited individuals, now i want to redesign the board. its my board and I would prefer my 'invitees' do not see my Board edits, and board redesign. is this possible? 

Hannah Humbert - Simpla Workflows

Sure is - https://help.trello.com/article/779-removing-a-member-from-a-board

When the board's ready, you can simply add them back to the board. 

Just note that if these people are workspace members as well, you'll need to switch the board visibility from "workspace visible" to "private" while you're making your edits.