Nik,
Your requirement seems very basic but it can be complex too, it depends upon the business requirement which fields you needed on the planning board.
Your screen shot is not visible however what I understood scheduler work place , see the worklist profile, check profile & Alert profile. What is customized will be visible to you from there you an edit the basic if you don't need generic field not required.
Get back with more clear screen shot to comment exactly on your requirement.