To run a spell check in Visio
On the Review tab of the Ribbon, select Spelling.
The Spelling checker walks through each term in the file that needs your attention.
If you want to change a term, select a replacement in the Suggestion box, then select Change.
Following are the features of the Spelling dialog box, which helps you check spelling in your Visio diagram.
Not in dictionary Shows the misspelled word.
Change to Provides a word to replace the misspelled word.
Suggestions Lists replacement words from the open dictionaries.
Ignore Ignores the word and continues checking.
Ignore All Ignores all instances of the word and continues checking.
Add Adds the word to the dictionary selected in the Add words to box.
Change Changes the word to the one in the Change to box.
Change All Changes all instances of the word to the one in the Change to box.
Options Displays the Spelling Options dialog box, where you can specify settings for the Spelling command.
Cancel Closes the Spelling dialog box, but does not undo any changes you have made.
Delete Deletes the word.
Delete All Deletes all instances of the word and continues checking.
We're sorry. Spell check isn't available in Visio for the web.
To request this feature, please go to this page in the Visio Suggestion Box and click the Vote button.