If Conditional formatting is not applying to all cells in Excel or Google Sheets, you need to check the formatting and rules.

I used to play formula roulette every time I dragged the fill handle, hoping Excel wouldn't misinterpret my intentions. Was I supposed to lock the column, the row, or both? Then, the dollar signs ...

Most spreadsheet problems come from static cell ranges—Excel tables replace them with dynamic, self-managing data structures.