Commands:
Edit > Find in Document...

The command Edit > Find in Document... displays the Document Search page.
A text to be searched in the document can be entered into the search field. This text can be formatted as a regular expression (syntax).
The result will be displayed as a list of the text environment around the found hit and its page number location. Clicking onto one of the page number displays the found text.
Clicking the history arrows Arrow - back forward brings you back to the search page.