When merging models/producing change scripts, all the differences are given a blue arrow (indicating they will be inlcuded in any merge). To exclude a change you need to go through the items and deselect them.
Could we have an option to set up the following before the comparison starts;
1 - all included (as now)
2 - LH included, RH excluded
3 - LH excluded, RH included
4 - all excluded
This would give a selectable starting point for the merge and reduce the time taken to set up a merge of just a few items.
An example would be where new tables have been created in the development database. Just the new tables could be REd into a model and that small model easily merged into the full model using option 2 above. At the moment you either go through each item or deselect everything (which takes a long time for TDM to process) and add the parts you want.