I have done something to my settings. The dockers window has horizontal tabs. For example I can have Transformations, Text Properties, Object Properties, ect., appear on those tabs for easy switching.
Something I have change has it that sometimes when I do to Windows>Dockers and pick a new docker it opens a second docker instead of adding a tab to the open docker.
How do I change docker setting so as a new tab is added to the current open docker and a new docker doesn't appear?