The shortcut F7 is to display the spelling dialog box for the spelling checks.
Step 1: Click anywhere in the worksheet;
Step 2: Press the Key "F7" from the keyboard, and the spelling dialog box will appear. Click "Yes" in the new window;
Step 3: Click "OK" in the next dialog box: "Spell check complete. You're good to go!"
Alternatively, you can also use the command from the ribbon to bring up the spelling dialog box with the steps below:
Step 1: Click the "Review" tab from the ribbon;
Step 2: Click "Spelling" from the "Proofing" section.
Step 3: Click "Yes" in the new dialog box where it says "Do you want to continue checking at the beginning of the sheet?"
Step 4: When you finish all the changes, click "OK" in the next dialog box where it says "Spell check complete. You're good to go!"