Ctrl+Down Arrow is one of the navigation shortcuts. Depending on where the cursor now is, when pressing the shortcut, the mouse cursor can move to the top or bottom edge of the current data range or the very bottom of the worksheet. Please see more shortcuts with arrows.
1. When the cursor is above the current data range
Step 1: Click any cell above the current data range;
Step 2: Press the key "Ctrl" from the keyboard and hold it, then press the "Down Arrow" key.
The cursor will move to the top edge of the current data range.
2. When the cursor is anywhere in the data range
Step 1: Click any cell in the current data range;
Step 2: Press the Key "Ctrl" from the keyboard and hold it, then press the key "Down Arrow".
The cursor will move to the bottom edge of the current data range.
3. When the cursor is on the bottom edge of the data range
Step 1: Click any bottom cell in the current data range;
Step 2: Press the Key "Ctrl" from the keyboard and hold it, then press the key "Down Arrow".
The cursor will move to the bottom of the current Worksheet.