You could select those cells, and unlock them (Format>Cells, Protection tab)
Then, protect the worksheet (Tools>Protection>Protect Sheet
When you press the Tab key, you'll move to the next unlocked cell.
You could select those cells, and unlock them (Format>Cells, Protection tab)
Then, protect the worksheet (Tools>Protection>Protect Sheet
When you press the Tab key, you'll move to the next unlocked cell.