This video describes the recent menu changes done primarily for google docs. Some of the changes are applicable to google slides as well.
3 changes which have been discussed are -
1. Document Outline Tool being moved from Tools to View and renamed as Show Document Outline
2. Format - Lists has been changed to Format - Bullets and Numberings and then choose from the list options
3. Insert Page Break has now been modified to Insert - Break and then select either Page break or column break.