Modeling tools facilitate the development process from modeling to coding. Such tools can be designed using a Model-Driven approach into metamodeling environments called metaCASE tools. It turned out that current metaCASE tools still require, in most cases, manual programming to build full tool support for the modeling language. First of all, we want to specify, using models, diagrams editors with a high graphical expressiveness without any need for manual intervention to perform this task. The second axis is dedicated to this specification reuse in other contexts of use. The redundancy of diagrams editors specification raises the problem of inconsistency during the evolution or the update of this specification. We propose then MID, a tool based on a set of meta-models supporting the easy specification of modeling editors with reusable components.