If you’re trying to type a certain scientific symbol on your computer, it is at times tedious to browse through pages of special character pane to locate the symbol that you need. Google Docs has a helpful feature where you can hand draw your character to narrow down the search.
On Google Docs menu, select Insert > Special Characters to bring up the dialog box. On the right panel there is an empty area for you to hand draw your symbol. Your input will then be used to narrow down the search with the filtered search result display on the left panel.
This tool is handy even if you’re not a regular Google Docs user. Simply use it to locate the symbols that you need, then copy and paste them from Google Docs to Pages, Word or whatever editor you’re using.