[GNC] Selling stock

[Heide Wang]

I have held stocks in my Gnucash account for over 10 years; I've never sold
them. I recently sold the stock for a profit. What is the correct way to
record it to show the profit?  I entered the negative share number and
total sold price, then tabbed the split, but it recorded the sale without
showing any profit. What did I do wrong?
I used Gnucash 5.10. My operating system is macOS Sequoia 15.7.3.
Thank you for your help.
Heide