The Review tab contains everything you need to run Spell Check and the Thesaurus. But, in addition to those common tools, you also have full access to inserting comments onto your presentation.
Figure 66. Review Tab
The Proofing group on the Review tab contains all the proofing commands you need including Spelling & Grammar and Thesaurus.
Figure 67. Proofing Group
Figure 68. Comments Group
The Comments group on the Review tab contains only commands related to inserting, deleting and navigating comments.
The Protect group on the Review tab contains only one command – Protect Presentation. This command can be used to set password security on the current presentation.
Figure 69. Protect Group