CKEditor Advanced Blocks plugins is more comfort alternative for standard "Blocks" plugin of CKEditor.
It is very easy why you are to use our plugin: it does not changes dimensions of blocks while displaying their borders, that allows to not break a markup in editing process. Also usefull may be to set minimum blocks height to handle elements with zero height (yes, it this case you dimensions will be changed for such elements).
Also it allows you to delete blocks after selecting them.
Plugin can be loaded automatically in turned on or in turned off mode.