Modify the tag stack of the window {nr} using {dict}. {nr} can be the window number or the |window-ID|. For a list of supported items in {dict}, refer to |gettagstack()| If {action} is not present or is set to 'r', then the tag stack is replaced. If {action} is set to 'a', then new entries from {dict} are pushed onto the tag stack. Returns zero for success, -1 for failure. Examples: Set current index of the tag stack to 4: call settagstack(1005, {'curidx' : 4}) Empty the tag stack of window 3: call settagstack(3, {'items' : []}) Push a new item onto the tag stack: let pos = [bufnr('myfile.txt'), 10, 1, 0] let newtag = [{'tagname' : 'mytag', 'from' : pos}] call settagstack(2, {'items' : newtag}, 'a') Save and restore the tag stack: let stack = gettagstack(1003) " do something else call settagstack(1003, stack) unlet stack Can also be used as a |method|, the base is passed as the second argument: GetStack()->settagstack(winnr)